Number of one-year-olds who are not vaccinated against diphtheria in Sri Lanka
Sri Lanka: Number of one-year-olds who are not vaccinated against diphtheria was 0.0525 one-year-olds per square kilometre in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Sri Lanka, 1980–2023
Source: Statizoid (derived). Measured in one-year-olds per square kilometre.
Analysis
In 2023, number of one-year-olds who are not vaccinated against diphtheria in Sri Lanka stood at 0.0525 one-year-olds per square kilometre. That is the lowest value across all 44 years on record.
The figure is down 50.4% on the previous year and down 8.1% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Sri Lanka peaked at 3.57 one-year-olds per square kilometre in 1981 and was at its lowest, 0.0525 one-year-olds per square kilometre, in 2023.
That places Sri Lanka 131st out of 192 countries with data for 2023, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Number of one-year-olds who are not vaccinated against diphtheria in Sri Lanka, year by year
| Year | one-year-olds per square kilometre | Change |
|---|---|---|
| 1980 | 3.46 one-year-olds per square kilometre | — |
| 1981 | 3.57 one-year-olds per square kilometre | +3.2% |
| 1982 | 2.79 one-year-olds per square kilometre | -22.0% |
| 1983 | 2.25 one-year-olds per square kilometre | -19.2% |
| 1984 | 2 one-year-olds per square kilometre | -11.4% |
| 1985 | 1.69 one-year-olds per square kilometre | -15.4% |
| 1986 | 1.37 one-year-olds per square kilometre | -19.0% |
| 1987 | 1.22 one-year-olds per square kilometre | -10.8% |
| 1988 | 0.8809 one-year-olds per square kilometre | -27.8% |
| 1989 | 0.6646 one-year-olds per square kilometre | -24.6% |
| 1990 | 0.7174 one-year-olds per square kilometre | +7.9% |
| 1991 | 0.7258 one-year-olds per square kilometre | +1.2% |
| 1992 | 0.625 one-year-olds per square kilometre | -13.9% |
| 1993 | 0.5251 one-year-olds per square kilometre | -16.0% |
| 1994 | 0.6374 one-year-olds per square kilometre | +21.4% |
| 1995 | 0.3756 one-year-olds per square kilometre | -41.1% |
| 1996 | 0.4315 one-year-olds per square kilometre | +14.9% |
| 1997 | 0.1626 one-year-olds per square kilometre | -62.3% |
| 1998 | 0.328 one-year-olds per square kilometre | +101.7% |
| 1999 | 0.055 one-year-olds per square kilometre | -83.2% |
| 2000 | 0.055 one-year-olds per square kilometre | +0.0% |
| 2001 | 0.1108 one-year-olds per square kilometre | +101.6% |
| 2002 | 0.1136 one-year-olds per square kilometre | +2.5% |
| 2003 | 0.0578 one-year-olds per square kilometre | -49.2% |
| 2004 | 0.1735 one-year-olds per square kilometre | +200.4% |
| 2005 | 0.0579 one-year-olds per square kilometre | -66.6% |
| 2006 | 0.1161 one-year-olds per square kilometre | +100.6% |
| 2007 | 0.1166 one-year-olds per square kilometre | +0.4% |
| 2008 | 0.1168 one-year-olds per square kilometre | +0.2% |
| 2009 | 0.1751 one-year-olds per square kilometre | +49.9% |
| 2010 | 0.0582 one-year-olds per square kilometre | -66.8% |
| 2011 | 0.0579 one-year-olds per square kilometre | -0.6% |
| 2012 | 0.0573 one-year-olds per square kilometre | -0.9% |
| 2013 | 0.0571 one-year-olds per square kilometre | -0.4% |
| 2014 | 0.0573 one-year-olds per square kilometre | +0.3% |
| 2015 | 0.0575 one-year-olds per square kilometre | +0.4% |
| 2016 | 0.0563 one-year-olds per square kilometre | -2.1% |
| 2017 | 0.0553 one-year-olds per square kilometre | -1.8% |
| 2018 | 0.0547 one-year-olds per square kilometre | -1.2% |
| 2019 | 0.0542 one-year-olds per square kilometre | -0.8% |
| 2020 | 0.2152 one-year-olds per square kilometre | +297.0% |
| 2021 | 0.2133 one-year-olds per square kilometre | -0.9% |
| 2022 | 0.1057 one-year-olds per square kilometre | -50.4% |
| 2023 | 0.0525 one-year-olds per square kilometre | -50.4% |
Sri Lanka compared with similar countries
- Sri Lanka's 0.0525 one-year-olds per square kilometre is below the median for upper middle income countries, which is 0.0969 one-year-olds per square kilometre, 54% of the median. (58 countries reporting)
- Sri Lanka's 0.0525 one-year-olds per square kilometre is below the median for South Asia, which is 0.3167 one-year-olds per square kilometre, 17% of the median. (6 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Sri Lanka changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2020 | +297.0% | 0.0542 one-year-olds per square kilometre | 0.2152 one-year-olds per square kilometre |
| 2004 | +200.4% | 0.0578 one-year-olds per square kilometre | 0.1735 one-year-olds per square kilometre |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 1.99 one-year-olds per square kilometre | 0.6646 one-year-olds per square kilometre | 3.57 one-year-olds per square kilometre | 10 |
| 1990s | 0.4583 one-year-olds per square kilometre | 0.055 one-year-olds per square kilometre | 0.7258 one-year-olds per square kilometre | 10 |
| 2000s | 0.1093 one-year-olds per square kilometre | 0.055 one-year-olds per square kilometre | 0.1751 one-year-olds per square kilometre | 10 |
| 2010s | 0.0566 one-year-olds per square kilometre | 0.0542 one-year-olds per square kilometre | 0.0582 one-year-olds per square kilometre | 10 |
| 2020s | 0.1467 one-year-olds per square kilometre | 0.0525 one-year-olds per square kilometre | 0.2152 one-year-olds per square kilometre | 4 |
Countries ranked near Sri Lanka
- 128 Ireland 0.059 one-year-olds per square kilometre compare
- 129 Bahamas 0.0564 one-year-olds per square kilometre compare
- 130 Poland 0.0539 one-year-olds per square kilometre compare
- 132 South Korea 0.0521 one-year-olds per square kilometre compare
- 133 France 0.0516 one-year-olds per square kilometre compare
- 134 Serbia 0.0515 one-year-olds per square kilometre compare
More health data for Sri Lanka
- Un projection of annual infant deaths, annual growth rate -1.62 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.7332 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,250 deaths per 1,000 people (2090)
- Number of infants who die before age 1 304 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2025)
- Population ages 00-04, female, annual growth rate -2.13 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0339 units per person (2025)
- Population ages 00-04, male, annual growth rate -2.12 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0 units per US$ of GDP (2025)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against diphtheria in Sri Lanka?
- Number of one-year-olds who are not vaccinated against diphtheria in Sri Lanka was 0.0525 one-year-olds per square kilometre in 2023, according to Statizoid (derived).
- What is the highest number of one-year-olds who are not vaccinated against diphtheria recorded in Sri Lanka?
- The highest recorded value was 3.57 one-year-olds per square kilometre in 1981.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Sri Lanka?
- The lowest recorded value was 0.0525 one-year-olds per square kilometre in 2023.
- How does Sri Lanka rank for number of one-year-olds who are not vaccinated against diphtheria?
- Sri Lanka ranks 131st out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Sri Lanka?
- Over the last ten years it is down 8.1%. The long-run trend across the full record is volatile.
- Where does this Sri Lanka data come from?
- The figures come from Statizoid (derived), published as part of Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus, per square kilometre. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 44 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus 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.
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus ÷ Land area (sq. km)
Computed from
- Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data
- 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
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus 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.