Number of one-year-olds who are not vaccinated against diphtheria in Seychelles
Seychelles: Number of one-year-olds who are not vaccinated against diphtheria was 0.1177 one-year-olds per square kilometre in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Seychelles, 1981–2023
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 Seychelles stood at 0.1177 one-year-olds per square kilometre.
Compared with earlier readings it is up 0.7% on the previous year and up 68.0% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Seychelles peaked at 2.98 one-year-olds per square kilometre in 1981 and was at its lowest, 0.0312 one-year-olds per square kilometre, in 2003.
That places Seychelles 98th 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 Seychelles, year by year
| Year | one-year-olds per square kilometre | Change |
|---|---|---|
| 1981 | 2.98 one-year-olds per square kilometre | — |
| 1982 | 1.56 one-year-olds per square kilometre | -47.6% |
| 1983 | 0.1048 one-year-olds per square kilometre | -93.3% |
| 1984 | 0.1755 one-year-olds per square kilometre | +67.5% |
| 1985 | 0.4955 one-year-olds per square kilometre | +182.3% |
| 1986 | 0.2148 one-year-olds per square kilometre | -56.6% |
| 1987 | 0.3958 one-year-olds per square kilometre | +84.2% |
| 1988 | 0.2151 one-year-olds per square kilometre | -45.7% |
| 1989 | 0.1075 one-year-olds per square kilometre | -50.0% |
| 1990 | 0.0357 one-year-olds per square kilometre | -66.8% |
| 1991 | 0.0707 one-year-olds per square kilometre | +98.3% |
| 1992 | 0.1403 one-year-olds per square kilometre | +98.5% |
| 1993 | 0.1388 one-year-olds per square kilometre | -1.1% |
| 1994 | 0.1407 one-year-olds per square kilometre | +1.4% |
| 1995 | 0.1084 one-year-olds per square kilometre | -23.0% |
| 1996 | 0.0351 one-year-olds per square kilometre | -67.6% |
| 1997 | 0.066 one-year-olds per square kilometre | +88.1% |
| 1998 | 0.0319 one-year-olds per square kilometre | -51.7% |
| 1999 | 0.0317 one-year-olds per square kilometre | -0.5% |
| 2000 | 0.0634 one-year-olds per square kilometre | +100.0% |
| 2001 | 0.1256 one-year-olds per square kilometre | +98.1% |
| 2002 | 0.0312 one-year-olds per square kilometre | -75.1% |
| 2003 | 0.0312 one-year-olds per square kilometre | -0.1% |
| 2004 | 0.0313 one-year-olds per square kilometre | +0.4% |
| 2005 | 0.0315 one-year-olds per square kilometre | +0.6% |
| 2006 | 0.0316 one-year-olds per square kilometre | +0.3% |
| 2007 | 0.0316 one-year-olds per square kilometre | +0.1% |
| 2008 | 0.0315 one-year-olds per square kilometre | -0.3% |
| 2009 | 0.0315 one-year-olds per square kilometre | -0.1% |
| 2010 | 0.032 one-year-olds per square kilometre | +1.7% |
| 2011 | 0.0332 one-year-olds per square kilometre | +3.5% |
| 2012 | 0.0686 one-year-olds per square kilometre | +106.7% |
| 2013 | 0.07 one-year-olds per square kilometre | +2.2% |
| 2014 | 0.0355 one-year-olds per square kilometre | -49.4% |
| 2015 | 0.1074 one-year-olds per square kilometre | +202.9% |
| 2016 | 0.1445 one-year-olds per square kilometre | +34.5% |
| 2017 | 0.11 one-year-olds per square kilometre | -23.9% |
| 2018 | 0.0372 one-year-olds per square kilometre | -66.2% |
| 2019 | 0.0375 one-year-olds per square kilometre | +0.7% |
| 2020 | 0.1127 one-year-olds per square kilometre | +200.7% |
| 2021 | 0.2262 one-year-olds per square kilometre | +100.7% |
| 2022 | 0.1169 one-year-olds per square kilometre | -48.3% |
| 2023 | 0.1177 one-year-olds per square kilometre | +0.7% |
Seychelles compared with similar countries
- Seychelles's 0.1177 one-year-olds per square kilometre is above the median for high income countries, which is 0.048 one-year-olds per square kilometre, 2.5× the median. (63 countries reporting)
- Seychelles's 0.1177 one-year-olds per square kilometre is below the median for Sub-Saharan Africa, which is 0.2848 one-year-olds per square kilometre, 41% of the median. (48 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.6949 one-year-olds per square kilometre | 0.1048 one-year-olds per square kilometre | 2.98 one-year-olds per square kilometre | 9 |
| 1990s | 0.0799 one-year-olds per square kilometre | 0.0317 one-year-olds per square kilometre | 0.1407 one-year-olds per square kilometre | 10 |
| 2000s | 0.044 one-year-olds per square kilometre | 0.0312 one-year-olds per square kilometre | 0.1256 one-year-olds per square kilometre | 10 |
| 2010s | 0.0676 one-year-olds per square kilometre | 0.032 one-year-olds per square kilometre | 0.1445 one-year-olds per square kilometre | 10 |
| 2020s | 0.1433 one-year-olds per square kilometre | 0.1127 one-year-olds per square kilometre | 0.2262 one-year-olds per square kilometre | 4 |
Countries ranked near Seychelles
- 95 Trinidad and Tobago 0.1283 one-year-olds per square kilometre compare
- 96 Zimbabwe 0.1219 one-year-olds per square kilometre compare
- 97 Solomon Islands 0.1197 one-year-olds per square kilometre compare
- 99 Congo 0.1158 one-year-olds per square kilometre compare
- 100 Niger 0.114 one-year-olds per square kilometre compare
- 101 Cape Verde 0.1109 one-year-olds per square kilometre compare
More health data for Seychelles
- Un projection of annual infant deaths, annual growth rate 0 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate -1.17 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,333 deaths per 1,000 people (2090)
- Number of infants who die before age 1 3 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2025)
- Population ages 00-04, female, annual growth rate -0.0987 % 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 0.033 units per person (2025)
- Population ages 00-04, male, annual growth rate -0.2838 % 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 Seychelles?
- Number of one-year-olds who are not vaccinated against diphtheria in Seychelles was 0.1177 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 Seychelles?
- The highest recorded value was 2.98 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 Seychelles?
- The lowest recorded value was 0.0312 one-year-olds per square kilometre in 2003.
- How does Seychelles rank for number of one-year-olds who are not vaccinated against diphtheria?
- Seychelles ranks 98th out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Seychelles?
- Over the last ten years it is up 68.0%. The long-run trend across the full record is volatile.
- Where does this Seychelles 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 — 43 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.