Number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe
Sao Tome and Principe: Number of one-year-olds who are not vaccinated against diphtheria was 66.06 % change on previous year in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe, 1982–2023
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
Sao Tome and Principe recorded 66.06 % change on previous year for number of one-year-olds who are not vaccinated against diphtheria in 2023.
Compared with earlier readings it is down 61.1% on the previous year and up 409.3% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe peaked at 169.62 % change on previous year in 2022 and was at its lowest, -77.84 % change on previous year, in 1990.
That places Sao Tome and Principe 16th out of 194 countries with data for 2023, putting it in the top 10%.
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 Sao Tome and Principe, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1982 | 15.43 % change on previous year | — |
| 1983 | 13.56 % change on previous year | -12.1% |
| 1984 | -30 % change on previous year | -321.3% |
| 1985 | 3.91 % change on previous year | -113.0% |
| 1986 | -31.2 % change on previous year | -898.3% |
| 1987 | -17.94 % change on previous year | -42.5% |
| 1988 | -15.43 % change on previous year | -14.0% |
| 1989 | 65.41 % change on previous year | -523.9% |
| 1990 | -77.84 % change on previous year | -219.0% |
| 1991 | 65.21 % change on previous year | -183.8% |
| 1992 | 150.36 % change on previous year | +130.6% |
| 1993 | 26.66 % change on previous year | -82.3% |
| 1994 | -57.49 % change on previous year | -315.6% |
| 1995 | 23.15 % change on previous year | -140.3% |
| 1996 | 52.05 % change on previous year | +124.8% |
| 1997 | -15.64 % change on previous year | -130.1% |
| 1998 | -0.3952 % change on previous year | -97.5% |
| 1999 | -19.09 % change on previous year | +4731.6% |
| 2000 | -18.71 % change on previous year | -2.0% |
| 2001 | -55.26 % change on previous year | +195.4% |
| 2002 | 9.85 % change on previous year | -117.8% |
| 2003 | -17.97 % change on previous year | -282.4% |
| 2004 | -32.18 % change on previous year | +79.1% |
| 2005 | -23.95 % change on previous year | -25.6% |
| 2006 | 1.84 % change on previous year | -107.7% |
| 2007 | 2.09 % change on previous year | +13.4% |
| 2008 | -66.04 % change on previous year | -3256.7% |
| 2009 | 102.03 % change on previous year | -254.5% |
| 2010 | -0.1339 % change on previous year | -100.1% |
| 2011 | 97.42 % change on previous year | -72872.3% |
| 2012 | -1.44 % change on previous year | -101.5% |
| 2013 | -21.36 % change on previous year | +1380.2% |
| 2014 | 74.5 % change on previous year | -448.8% |
| 2015 | -20.77 % change on previous year | -127.9% |
| 2016 | -1.49 % change on previous year | -92.8% |
| 2017 | 22.41 % change on previous year | -1604.9% |
| 2018 | -2.15 % change on previous year | -109.6% |
| 2019 | -1.36 % change on previous year | -36.8% |
| 2020 | -18.88 % change on previous year | +1289.3% |
| 2021 | -23.87 % change on previous year | +26.4% |
| 2022 | 169.62 % change on previous year | -810.7% |
| 2023 | 66.06 % change on previous year | -61.1% |
Sao Tome and Principe compared with similar countries
- Sao Tome and Principe's 66.06 % change on previous year is above the median for lower middle income countries, which is 2.01 % change on previous year, 32.8× the median. (46 countries reporting)
- Sao Tome and Principe's 66.06 % change on previous year is above the median for Sub-Saharan Africa, which is 0.8149 % change on previous year, 81.1× the median. (48 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe 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 |
|---|---|---|---|
| 2011 | +72872.3% | -0.1339 % change on previous year | 97.42 % change on previous year |
| 1999 | -4731.6% | -0.3952 % change on previous year | -19.09 % change on previous year |
| 2008 | -3256.7% | 2.09 % change on previous year | -66.04 % change on previous year |
| 2017 | +1604.9% | -1.49 % change on previous year | 22.41 % change on previous year |
| 2013 | -1380.2% | -1.44 % change on previous year | -21.36 % change on previous year |
| 2020 | -1289.3% | -1.36 % change on previous year | -18.88 % change on previous year |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.4663 % change on previous year | -31.2 % change on previous year | 65.41 % change on previous year | 8 |
| 1990s | 14.7 % change on previous year | -77.84 % change on previous year | 150.36 % change on previous year | 10 |
| 2000s | -9.83 % change on previous year | -66.04 % change on previous year | 102.03 % change on previous year | 10 |
| 2010s | 14.56 % change on previous year | -21.36 % change on previous year | 97.42 % change on previous year | 10 |
| 2020s | 48.23 % change on previous year | -23.87 % change on previous year | 169.62 % change on previous year | 4 |
Countries ranked near Sao Tome and Principe
- 13 Argentina 105.16 % change on previous year compare
- 14 Japan 94.06 % change on previous year compare
- 15 Indonesia 87.67 % change on previous year compare
- 17 Malaysia 62.44 % change on previous year compare
- 18 Czechia 62.03 % change on previous year compare
- 19 Panama 60.61 % change on previous year compare
More health data for Sao Tome and Principe
- Un projection of annual infant deaths, annual growth rate -6.25 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 1.35 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 793.5 deaths per 1,000 people (2090)
- Number of infants who die before age 1 15 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2021)
- Population ages 00-04, female, annual growth rate 1.58 % 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 0.0651 units per person (2025)
- Population ages 00-04, male, annual growth rate 1.65 % 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 Sao Tome and Principe?
- Number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe was 66.06 % change on previous year in 2023, according to Statizoid (derived).
- What is the highest number of one-year-olds who are not vaccinated against diphtheria recorded in Sao Tome and Principe?
- The highest recorded value was 169.62 % change on previous year in 2022.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Sao Tome and Principe?
- The lowest recorded value was -77.84 % change on previous year in 1990.
- How does Sao Tome and Principe rank for number of one-year-olds who are not vaccinated against diphtheria?
- Sao Tome and Principe ranks 16th out of 194 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Sao Tome and Principe?
- Over the last ten years it is up 409.3%. The long-run trend across the full record is volatile.
- Where does this Sao Tome and Principe 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, annual growth rate. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 42 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
The year-on-year percentage change in Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.
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
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
The year-on-year percentage change in Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.