Number of one-year-olds who are not vaccinated against diphtheria in Cook Islands
Cook Islands: Number of one-year-olds who are not vaccinated against diphtheria was -53.92 % change on previous year in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Cook Islands, 1981–2023
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
The most recent figure for number of one-year-olds who are not vaccinated against diphtheria in Cook Islands is -53.92 % change on previous year, measured in 2023.
That represents a change of down 244.7% on the previous year and down 1,328.9% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Cook Islands peaked at 608.92 % change on previous year in 2011 and was at its lowest, -94.35 % change on previous year, in 2010.
Cook Islands ranks 187th of 194 countries on this measure, 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 Cook Islands, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1981 | -11 % change on previous year | — |
| 1982 | -10.08 % change on previous year | -8.4% |
| 1983 | -13.44 % change on previous year | +33.4% |
| 1984 | 17.87 % change on previous year | -232.9% |
| 1985 | -58.69 % change on previous year | -428.5% |
| 1986 | -41.05 % change on previous year | -30.1% |
| 1987 | 32.36 % change on previous year | -178.8% |
| 1988 | -63.1 % change on previous year | -295.0% |
| 1989 | 91.32 % change on previous year | -244.7% |
| 1990 | -34.69 % change on previous year | -138.0% |
| 1991 | 91.28 % change on previous year | -363.2% |
| 1992 | 2.49 % change on previous year | -97.3% |
| 1993 | -92.25 % change on previous year | -3797.5% |
| 1995 | -50.51 % change on previous year | -45.2% |
| 1996 | 255.68 % change on previous year | -606.2% |
| 1997 | -72.46 % change on previous year | -128.3% |
| 1998 | -9.01 % change on previous year | -87.6% |
| 1999 | -0.4608 % change on previous year | -94.9% |
| 2000 | -8.99 % change on previous year | +1851.9% |
| 2001 | 16.28 % change on previous year | -281.0% |
| 2002 | -71.59 % change on previous year | -539.8% |
| 2003 | 32.45 % change on previous year | -145.3% |
| 2004 | -74.75 % change on previous year | -330.3% |
| 2005 | -0.6579 % change on previous year | -99.1% |
| 2006 | 0.9934 % change on previous year | -251.0% |
| 2007 | 1.31 % change on previous year | +32.0% |
| 2008 | 0 % change on previous year | -100.0% |
| 2010 | -94.35 % change on previous year | — |
| 2011 | 608.92 % change on previous year | -745.4% |
| 2012 | -71.43 % change on previous year | -111.7% |
| 2013 | -3.77 % change on previous year | -94.7% |
| 2014 | -52.45 % change on previous year | +1290.0% |
| 2015 | -3.44 % change on previous year | -93.4% |
| 2016 | -4.27 % change on previous year | +24.3% |
| 2017 | -4.83 % change on previous year | +13.2% |
| 2018 | -3.12 % change on previous year | -35.3% |
| 2019 | 94.35 % change on previous year | -3119.4% |
| 2020 | 427.18 % change on previous year | +352.7% |
| 2021 | 63.75 % change on previous year | -85.1% |
| 2022 | 37.27 % change on previous year | -41.5% |
| 2023 | -53.92 % change on previous year | -244.7% |
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Cook Islands 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 |
|---|---|---|---|
| 1993 | -3797.5% | 2.49 % change on previous year | -92.25 % change on previous year |
| 2019 | +3119.4% | -3.12 % change on previous year | 94.35 % change on previous year |
| 2000 | -1851.9% | -0.4608 % change on previous year | -8.99 % change on previous year |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -6.2 % change on previous year | -63.1 % change on previous year | 91.32 % change on previous year | 9 |
| 1990s | 10.01 % change on previous year | -92.25 % change on previous year | 255.68 % change on previous year | 9 |
| 2000s | -11.66 % change on previous year | -74.75 % change on previous year | 32.45 % change on previous year | 9 |
| 2010s | 46.56 % change on previous year | -94.35 % change on previous year | 608.92 % change on previous year | 10 |
| 2020s | 118.57 % change on previous year | -53.92 % change on previous year | 427.18 % change on previous year | 4 |
Countries ranked near Cook Islands
- 184 Jamaica -50.44 % change on previous year compare
- 185 Palau -51.24 % change on previous year compare
- 186 Ukraine -52.32 % change on previous year compare
- 188 Brazil -57.12 % change on previous year compare
- 189 Latvia -61.57 % change on previous year compare
- 190 Botswana -63.66 % change on previous year compare
More health data for Cook Islands
- Heat deaths vs projected death rates, annual growth rate 1.79 % change on previous year (2090)
- Un projection of annual infant deaths, annual growth rate -100 % change on previous year (2029)
- Estimated changes in temperature-related death rates compared to projected death rates 937.6 deaths per 1,000 people (2090)
- Number of infants who die before age 1 0 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2019)
- Measles - number of reported cases, gaps filled 0 (2019)
- Diphtheria - number of reported cases, gaps filled 0 (2019)
- Total tetanus - number of reported cases, gaps filled 0 (2019)
- Pertussis - number of reported cases, gaps filled 0 (2019)
- Infant deaths (UN IGME estimate, 2024), annual growth rate 0 % change on previous year (2024)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against diphtheria in Cook Islands?
- Number of one-year-olds who are not vaccinated against diphtheria in Cook Islands was -53.92 % 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 Cook Islands?
- The highest recorded value was 608.92 % change on previous year in 2011.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Cook Islands?
- The lowest recorded value was -94.35 % change on previous year in 2010.
- How does Cook Islands rank for number of one-year-olds who are not vaccinated against diphtheria?
- Cook Islands ranks 187th out of 194 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Cook Islands?
- Over the last ten years it is down 1,328.9%. The long-run trend across the full record is volatile.
- Where does this Cook Islands 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 — 41 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.