Pertussis - number of reported cases, per square kilometre in Sierra Leone
Sierra Leone: Pertussis - number of reported cases, per square kilometre was 0 units per square kilometre in 2021. ◆ Volatile
Latest (2021)
0 units per square kilometre
World rank
132nd
of 204 countries
All-time high
0.0289 units per square kilometre
in 1981
All-time low
0 units per square kilometre
in 1997
Years of data
16
1979–2021
Pertussis - number of reported cases, per square kilometre in Sierra Leone, 1979–2021
Source: Statizoid (derived). Measured in units per square kilometre.
Analysis
Sierra Leone recorded 0 units per square kilometre for pertussis - number of reported cases, per square kilometre in 2021. That is the lowest value across all 16 years on record.
Compared with earlier readings it is down 100.0% over ten years.
Over the whole period, pertussis - number of reported cases, per square kilometre in Sierra Leone peaked at 0.0289 units per square kilometre in 1981 and was at its lowest, 0 units per square kilometre, in 1997.
Sierra Leone ranks 132nd of 204 countries on this measure, in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Pertussis - number of reported cases, per square kilometre in Sierra Leone, year by year
| Year | units per square kilometre | Change |
|---|---|---|
| 1979 | 0.0197 units per square kilometre | — |
| 1980 | 0.0224 units per square kilometre | +13.6% |
| 1981 | 0.0289 units per square kilometre | +29.0% |
| 1982 | 0.0197 units per square kilometre | -31.8% |
| 1983 | 0.024 units per square kilometre | +21.5% |
| 1984 | 0.0218 units per square kilometre | -9.2% |
| 1985 | 0.0227 units per square kilometre | +4.1% |
| 1986 | 0.0017 units per square kilometre | -92.5% |
| 1987 | 0.0032 units per square kilometre | +85.4% |
| 1988 | 0.0001 units per square kilometre | -95.6% |
| 1997 | 0 units per square kilometre | -100.0% |
| 2000 | 0 units per square kilometre | — |
| 2003 | 0 units per square kilometre | — |
| 2007 | 0 units per square kilometre | — |
| 2011 | 0.0003 units per square kilometre | — |
| 2021 | 0 units per square kilometre | -100.0% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 0.0197 units per square kilometre | 0.0197 units per square kilometre | 0.0197 units per square kilometre | 1 |
| 1980s | 0.0161 units per square kilometre | 0.0001 units per square kilometre | 0.0289 units per square kilometre | 9 |
| 1990s | 0 units per square kilometre | 0 units per square kilometre | 0 units per square kilometre | 1 |
| 2000s | 0 units per square kilometre | 0 units per square kilometre | 0 units per square kilometre | 3 |
| 2010s | 0.0003 units per square kilometre | 0.0003 units per square kilometre | 0.0003 units per square kilometre | 1 |
| 2020s | 0 units per square kilometre | 0 units per square kilometre | 0 units per square kilometre | 1 |
Countries ranked near Sierra Leone
- 129 Burkina Faso 0 units per square kilometre compare
- 130 Congo 0 units per square kilometre compare
- 131 Namibia 0 units per square kilometre compare
- 132 Angola 0 units per square kilometre compare
- 132 American Samoa 0 units per square kilometre compare
- 132 Antigua and Barbuda 0 units per square kilometre compare
- 132 Burundi 0 units per square kilometre compare
- 132 Bangladesh 0 units per square kilometre compare
- 132 Bahrain 0 units per square kilometre compare
- 132 Bahamas 0 units per square kilometre compare
- 132 Belize 0 units per square kilometre compare
- 132 Barbados 0 units per square kilometre compare
- 132 Brunei Darussalam 0 units per square kilometre compare
- 132 Bhutan 0 units per square kilometre compare
- 132 Botswana 0 units per square kilometre compare
- 132 Cameroon 0 units per square kilometre compare
- 132 Comoros 0 units per square kilometre compare
- 132 Cape Verde 0 units per square kilometre compare
- 132 Cuba 0 units per square kilometre compare
- 132 Cayman Islands 0 units per square kilometre compare
- 132 Djibouti 0 units per square kilometre compare
- 132 Dominica 0 units per square kilometre compare
- 132 Egypt 0 units per square kilometre compare
- 132 Eritrea 0 units per square kilometre compare
- 132 Gabon 0 units per square kilometre compare
- 132 Ghana 0 units per square kilometre compare
- 132 Gambia 0 units per square kilometre compare
- 132 Guinea-Bissau 0 units per square kilometre compare
- 132 Equatorial Guinea 0 units per square kilometre compare
- 132 Grenada 0 units per square kilometre compare
- 132 Guatemala 0 units per square kilometre compare
- 132 Guam 0 units per square kilometre compare
- 132 Guyana 0 units per square kilometre compare
- 132 Iceland 0 units per square kilometre compare
- 132 Jamaica 0 units per square kilometre compare
- 132 Saint Kitts and Nevis 0 units per square kilometre
- 132 Liberia 0 units per square kilometre compare
- 132 Saint Lucia 0 units per square kilometre compare
- 132 Lesotho 0 units per square kilometre compare
- 132 Monaco 0 units per square kilometre compare
- 132 Maldives 0 units per square kilometre compare
- 132 Marshall Islands 0 units per square kilometre compare
- 132 Mali 0 units per square kilometre compare
- 132 Mongolia 0 units per square kilometre compare
- 132 Northern Mariana Islands 0 units per square kilometre compare
- 132 Mozambique 0 units per square kilometre compare
- 132 Mauritania 0 units per square kilometre compare
- 132 Mauritius 0 units per square kilometre compare
- 132 Malawi 0 units per square kilometre compare
- 132 New Caledonia 0 units per square kilometre compare
- 132 Nicaragua 0 units per square kilometre compare
- 132 Naoero 0 units per square kilometre compare
- 132 Palau 0 units per square kilometre
- 132 Korea, Democratic People's Republic of 0 units per square kilometre compare
- 132 French Polynesia 0 units per square kilometre compare
- 132 Rwanda 0 units per square kilometre compare
- 132 Senegal 0 units per square kilometre compare
- 132 El Salvador 0 units per square kilometre compare
- 132 Somalia 0 units per square kilometre compare
- 132 Sao Tome and Principe 0 units per square kilometre compare
- 132 Eswatini 0 units per square kilometre compare
- 132 Seychelles 0 units per square kilometre compare
- 132 Turks and Caicos Islands 0 units per square kilometre compare
- 132 Turkmenistan 0 units per square kilometre compare
- 132 Timor-Leste 0 units per square kilometre compare
- 132 Tonga 0 units per square kilometre compare
- 132 Trinidad and Tobago 0 units per square kilometre compare
- 132 Tuvalu 0 units per square kilometre compare
- 132 Tanzania, United Republic of 0 units per square kilometre compare
- 132 Uganda 0 units per square kilometre compare
- 132 Saint Vincent and the Grenadines 0 units per square kilometre compare
- 132 Venezuela, Bolivarian Republic of 0 units per square kilometre compare
- 132 British Virgin Islands 0 units per square kilometre
- 132 Samoa 0 units per square kilometre compare
- 132 Zambia 0 units per square kilometre compare
More health data for Sierra Leone
- Un projection of annual infant deaths, annual growth rate -2.34 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.773 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,199 deaths per 1,000 people (2090)
- Number of infants who die before age 1 4,209 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 38 (2025)
- Population ages 00-04, female, annual growth rate 0.6447 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0.0001 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0663 units per person (2025)
- Population ages 00-04, male, annual growth rate 0.6611 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0.0001 units per US$ of GDP (2025)
Frequently asked questions
- What is pertussis - number of reported cases, per square kilometre in Sierra Leone?
- Pertussis - number of reported cases, per square kilometre in Sierra Leone was 0 units per square kilometre in 2021, according to Statizoid (derived).
- What is the highest pertussis - number of reported cases, per square kilometre recorded in Sierra Leone?
- The highest recorded value was 0.0289 units per square kilometre in 1981.
- What is the lowest pertussis - number of reported cases, per square kilometre recorded in Sierra Leone?
- The lowest recorded value was 0 units per square kilometre in 1997.
- How does Sierra Leone rank for pertussis - number of reported cases, per square kilometre?
- Sierra Leone ranks 132nd out of 204 countries with data for 2021.
- Is pertussis - number of reported cases, per square kilometre rising or falling in Sierra Leone?
- Over the last ten years it is down 100.0%. The long-run trend across the full record is volatile.
- Where does this Sierra Leone data come from?
- The figures come from Statizoid (derived), published as part of Pertussis - number of reported cases, per square kilometre. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 16 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Pertussis - number of reported cases divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.
Pertussis - number of reported cases ÷ Land area (sq. km)
Computed from
- Pertussis - number of reported cases World Health Organization, Global Health Observatory
- Land area FAOSTAT, Food and Agriculture Organization of the United Nations (FAO)
Statizoid computes this series; the underlying measurements belong to the publishers named above. The arithmetic is applied to every country and year where both inputs report, and nothing is estimated unless the page says so.
About this data
Pertussis - number of reported cases divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.