Number of one-year-olds who are not vaccinated against diphtheria in Samoa
Samoa: Number of one-year-olds who are not vaccinated against diphtheria was 0.3376 one-year-olds per square kilometre in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Samoa, 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 Samoa stood at 0.3376 one-year-olds per square kilometre.
The figure is down 31.2% on the previous year and up 1.0% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Samoa peaked at 1.31 one-year-olds per square kilometre in 1980 and was at its lowest, 0.0194 one-year-olds per square kilometre, in 1998.
Samoa ranks 55th of 192 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.
Number of one-year-olds who are not vaccinated against diphtheria in Samoa, year by year
| Year | one-year-olds per square kilometre | Change |
|---|---|---|
| 1980 | 1.31 one-year-olds per square kilometre | — |
| 1981 | 0.631 one-year-olds per square kilometre | -52.0% |
| 1982 | 0.2417 one-year-olds per square kilometre | -61.7% |
| 1983 | 0.2041 one-year-olds per square kilometre | -15.6% |
| 1984 | 0.0743 one-year-olds per square kilometre | -63.6% |
| 1985 | 0.2057 one-year-olds per square kilometre | +176.9% |
| 1986 | 0.1148 one-year-olds per square kilometre | -44.2% |
| 1987 | 0.1359 one-year-olds per square kilometre | +18.4% |
| 1988 | 0.1907 one-year-olds per square kilometre | +40.3% |
| 1989 | 0.6298 one-year-olds per square kilometre | +230.3% |
| 1990 | 0.1827 one-year-olds per square kilometre | -71.0% |
| 1991 | 0.3849 one-year-olds per square kilometre | +110.6% |
| 1992 | 0.1664 one-year-olds per square kilometre | -56.8% |
| 1993 | 0.1492 one-year-olds per square kilometre | -10.3% |
| 1994 | 0.1306 one-year-olds per square kilometre | -12.4% |
| 1995 | 0.112 one-year-olds per square kilometre | -14.2% |
| 1996 | 0.0951 one-year-olds per square kilometre | -15.2% |
| 1997 | 0.0781 one-year-olds per square kilometre | -17.8% |
| 1998 | 0.0194 one-year-olds per square kilometre | -75.2% |
| 1999 | 0.0567 one-year-olds per square kilometre | +192.3% |
| 2000 | 0.0381 one-year-olds per square kilometre | -32.8% |
| 2001 | 0.1931 one-year-olds per square kilometre | +406.4% |
| 2002 | 0.1553 one-year-olds per square kilometre | -19.6% |
| 2003 | 0.1912 one-year-olds per square kilometre | +23.1% |
| 2004 | 0.6889 one-year-olds per square kilometre | +260.4% |
| 2005 | 0.7584 one-year-olds per square kilometre | +10.1% |
| 2006 | 0.9261 one-year-olds per square kilometre | +22.1% |
| 2007 | 0.6505 one-year-olds per square kilometre | -29.8% |
| 2008 | 1.15 one-year-olds per square kilometre | +76.5% |
| 2009 | 0.6926 one-year-olds per square kilometre | -39.7% |
| 2010 | 0.4342 one-year-olds per square kilometre | -37.3% |
| 2011 | 0.3658 one-year-olds per square kilometre | -15.8% |
| 2012 | 0.3735 one-year-olds per square kilometre | +2.1% |
| 2013 | 0.3342 one-year-olds per square kilometre | -10.5% |
| 2014 | 0.4587 one-year-olds per square kilometre | +37.2% |
| 2015 | 0.4165 one-year-olds per square kilometre | -9.2% |
| 2016 | 0.5404 one-year-olds per square kilometre | +29.7% |
| 2017 | 0.6929 one-year-olds per square kilometre | +28.2% |
| 2018 | 1.17 one-year-olds per square kilometre | +69.4% |
| 2019 | 0.6797 one-year-olds per square kilometre | -42.1% |
| 2020 | 0.235 one-year-olds per square kilometre | -65.4% |
| 2021 | 0.3152 one-year-olds per square kilometre | +34.1% |
| 2022 | 0.4904 one-year-olds per square kilometre | +55.6% |
| 2023 | 0.3376 one-year-olds per square kilometre | -31.2% |
Samoa compared with similar countries
- Samoa's 0.3376 one-year-olds per square kilometre is above the median for upper middle income countries, which is 0.0969 one-year-olds per square kilometre, 3.5× the median. (58 countries reporting)
- Samoa's 0.3376 one-year-olds per square kilometre is above the median for East Asia & Pacific, which is 0.1666 one-year-olds per square kilometre, 2.0× the median. (30 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Samoa 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 |
|---|---|---|---|
| 2001 | +406.4% | 0.0381 one-year-olds per square kilometre | 0.1931 one-year-olds per square kilometre |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.3742 one-year-olds per square kilometre | 0.0743 one-year-olds per square kilometre | 1.31 one-year-olds per square kilometre | 10 |
| 1990s | 0.1375 one-year-olds per square kilometre | 0.0194 one-year-olds per square kilometre | 0.3849 one-year-olds per square kilometre | 10 |
| 2000s | 0.5442 one-year-olds per square kilometre | 0.0381 one-year-olds per square kilometre | 1.15 one-year-olds per square kilometre | 10 |
| 2010s | 0.547 one-year-olds per square kilometre | 0.3342 one-year-olds per square kilometre | 1.17 one-year-olds per square kilometre | 10 |
| 2020s | 0.3445 one-year-olds per square kilometre | 0.235 one-year-olds per square kilometre | 0.4904 one-year-olds per square kilometre | 4 |
Countries ranked near Samoa
- 52 Angola 0.3475 one-year-olds per square kilometre compare
- 53 Somalia 0.3467 one-year-olds per square kilometre compare
- 54 East Timor 0.342 one-year-olds per square kilometre compare
- 56 San Marino 0.3315 one-year-olds per square kilometre compare
- 57 Ecuador 0.3313 one-year-olds per square kilometre compare
- 58 Cambodia 0.3271 one-year-olds per square kilometre compare
More health data for Samoa
- Un projection of annual infant deaths, annual growth rate 0 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 1.71 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 708.7 deaths per 1,000 people (2090)
- Number of infants who die before age 1 17 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 1 (2025)
- Population ages 00-04, female, annual growth rate -2.45 % 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 0.0591 units per person (2025)
- Population ages 00-04, male, annual growth rate -2.5 % 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 Samoa?
- Number of one-year-olds who are not vaccinated against diphtheria in Samoa was 0.3376 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 Samoa?
- The highest recorded value was 1.31 one-year-olds per square kilometre in 1980.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Samoa?
- The lowest recorded value was 0.0194 one-year-olds per square kilometre in 1998.
- How does Samoa rank for number of one-year-olds who are not vaccinated against diphtheria?
- Samoa ranks 55th out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Samoa?
- Over the last ten years it is up 1.0%. The long-run trend across the full record is volatile.
- Where does this Samoa 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.