Number of one-year-olds who are not vaccinated against diphtheria in Tonga
Tonga: Number of one-year-olds who are not vaccinated against diphtheria was 0.0002 one-year-olds per person in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Tonga, 1980–2023
Source: Statizoid (derived). Measured in one-year-olds per person.
Analysis
Tonga recorded 0.0002 one-year-olds per person for number of one-year-olds who are not vaccinated against diphtheria in 2023.
Compared with earlier readings it is up 1.0% on the previous year and down 11.8% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Tonga peaked at 0.0195 one-year-olds per person in 1981 and was at its lowest, 0.0002 one-year-olds per person, in 2021.
That places Tonga 166th out of 192 countries with data for 2023, putting it in the bottom quarter.
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 Tonga, year by year
| Year | one-year-olds per person | Change |
|---|---|---|
| 1980 | 0.0188 one-year-olds per person | — |
| 1981 | 0.0195 one-year-olds per person | +3.6% |
| 1982 | 0.0148 one-year-olds per person | -24.4% |
| 1983 | 0.0113 one-year-olds per person | -23.1% |
| 1984 | 0.0151 one-year-olds per person | +32.8% |
| 1985 | 0.0025 one-year-olds per person | -83.5% |
| 1986 | 0.0078 one-year-olds per person | +216.0% |
| 1987 | 0.0003 one-year-olds per person | -96.0% |
| 1988 | 0.0025 one-year-olds per person | +690.6% |
| 1989 | 0.0021 one-year-olds per person | -14.4% |
| 1990 | 0.0018 one-year-olds per person | -16.8% |
| 1991 | 0.0035 one-year-olds per person | +95.6% |
| 1992 | 0.0003 one-year-olds per person | -91.8% |
| 1993 | 0.0011 one-year-olds per person | +298.7% |
| 1994 | 0.0031 one-year-olds per person | +175.2% |
| 1995 | 0.0014 one-year-olds per person | -54.1% |
| 1996 | 0.0003 one-year-olds per person | -79.8% |
| 1997 | 0.0011 one-year-olds per person | +295.5% |
| 1998 | 0.0008 one-year-olds per person | -25.9% |
| 1999 | 0.0017 one-year-olds per person | +99.1% |
| 2000 | 0.0014 one-year-olds per person | -17.2% |
| 2001 | 0.0017 one-year-olds per person | +20.1% |
| 2002 | 0.0028 one-year-olds per person | +66.1% |
| 2003 | 0.0006 one-year-olds per person | -80.1% |
| 2004 | 0.0003 one-year-olds per person | -49.7% |
| 2005 | 0.0003 one-year-olds per person | +0.5% |
| 2006 | 0.0003 one-year-olds per person | -0.3% |
| 2007 | 0.0003 one-year-olds per person | -0.9% |
| 2008 | 0.0003 one-year-olds per person | -1.3% |
| 2009 | 0.0003 one-year-olds per person | -2.1% |
| 2010 | 0.0003 one-year-olds per person | -1.3% |
| 2011 | 0.0003 one-year-olds per person | +2.9% |
| 2012 | 0.0014 one-year-olds per person | +397.3% |
| 2013 | 0.0003 one-year-olds per person | -80.8% |
| 2014 | 0.0005 one-year-olds per person | +97.6% |
| 2015 | 0.001 one-year-olds per person | +99.4% |
| 2016 | 0.001 one-year-olds per person | -0.3% |
| 2017 | 0.0002 one-year-olds per person | -75.8% |
| 2018 | 0.0002 one-year-olds per person | -4.1% |
| 2019 | 0.0002 one-year-olds per person | -2.7% |
| 2020 | 0.0002 one-year-olds per person | -2.2% |
| 2021 | 0.0002 one-year-olds per person | -0.7% |
| 2022 | 0.0002 one-year-olds per person | +1.4% |
| 2023 | 0.0002 one-year-olds per person | +1.0% |
Tonga compared with similar countries
- Tonga's 0.0002 one-year-olds per person is below the median for upper middle income countries, which is 0.0015 one-year-olds per person, 16% of the median. (58 countries reporting)
- Tonga's 0.0002 one-year-olds per person is below the median for East Asia & Pacific, which is 0.0013 one-year-olds per person, 17% of the median. (30 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Tonga 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 |
|---|---|---|---|
| 1988 | +690.6% | 0.0003 one-year-olds per person | 0.0025 one-year-olds per person |
| 2012 | +397.3% | 0.0003 one-year-olds per person | 0.0014 one-year-olds per person |
| 1993 | +298.7% | 0.0003 one-year-olds per person | 0.0011 one-year-olds per person |
| 1997 | +295.5% | 0.0003 one-year-olds per person | 0.0011 one-year-olds per person |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.0095 one-year-olds per person | 0.0003 one-year-olds per person | 0.0195 one-year-olds per person | 10 |
| 1990s | 0.0015 one-year-olds per person | 0.0003 one-year-olds per person | 0.0035 one-year-olds per person | 10 |
| 2000s | 0.0008 one-year-olds per person | 0.0003 one-year-olds per person | 0.0028 one-year-olds per person | 10 |
| 2010s | 0.0005 one-year-olds per person | 0.0002 one-year-olds per person | 0.0014 one-year-olds per person | 10 |
| 2020s | 0.0002 one-year-olds per person | 0.0002 one-year-olds per person | 0.0002 one-year-olds per person | 4 |
Countries ranked near Tonga
- 163 China 0.0003 one-year-olds per person compare
- 164 Naoero 0.0003 one-year-olds per person compare
- 165 Uzbekistan 0.0003 one-year-olds per person compare
- 167 Maldives 0.0002 one-year-olds per person compare
- 168 Kazakhstan 0.0002 one-year-olds per person compare
- 169 Belgium 0.0002 one-year-olds per person compare
More health data for Tonga
- Un projection of annual infant deaths, annual growth rate -33.33 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 2.33 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 834.5 deaths per 1,000 people (2090)
- Number of infants who die before age 1 2 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2025)
- Population ages 00-04, female, annual growth rate -1.42 % 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 0.0535 units per person (2025)
- Population ages 00-04, male, annual growth rate -1.36 % 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 Tonga?
- Number of one-year-olds who are not vaccinated against diphtheria in Tonga was 0.0002 one-year-olds per person in 2023, according to Statizoid (derived).
- What is the highest number of one-year-olds who are not vaccinated against diphtheria recorded in Tonga?
- The highest recorded value was 0.0195 one-year-olds per person in 1981.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Tonga?
- The lowest recorded value was 0.0002 one-year-olds per person in 2021.
- How does Tonga rank for number of one-year-olds who are not vaccinated against diphtheria?
- Tonga ranks 166th out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Tonga?
- Over the last ten years it is down 11.8%. The long-run trend across the full record is volatile.
- Where does this Tonga 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 capita. 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 Population, total, 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 ÷ Population, total
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
- Population, total World Population Prospects, United Nations (UN)
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 Population, total, matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.