Number of one-year-olds who are not vaccinated against diphtheria in Bulgaria
Bulgaria: Number of one-year-olds who are not vaccinated against diphtheria was 0.0454 one-year-olds per square kilometre in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Bulgaria, 1980–2023
Source: Statizoid (derived). Measured in one-year-olds per square kilometre.
Analysis
Bulgaria recorded 0.0454 one-year-olds per square kilometre for number of one-year-olds who are not vaccinated against diphtheria in 2023.
The figure is down 7.6% on the previous year and up 45.3% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Bulgaria peaked at 0.0729 one-year-olds per square kilometre in 2014 and was at its lowest, 0.0094 one-year-olds per square kilometre, in 1991.
Bulgaria ranks 139th 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 Bulgaria, year by year
| Year | one-year-olds per square kilometre | Change |
|---|---|---|
| 1980 | 0.0239 one-year-olds per square kilometre | — |
| 1981 | 0.0117 one-year-olds per square kilometre | -51.2% |
| 1982 | 0.0112 one-year-olds per square kilometre | -4.1% |
| 1983 | 0.011 one-year-olds per square kilometre | -1.5% |
| 1984 | 0.011 one-year-olds per square kilometre | -0.4% |
| 1985 | 0.0108 one-year-olds per square kilometre | -1.2% |
| 1986 | 0.011 one-year-olds per square kilometre | +1.2% |
| 1987 | 0.0109 one-year-olds per square kilometre | -0.3% |
| 1988 | 0.0105 one-year-olds per square kilometre | -3.6% |
| 1989 | 0.0103 one-year-olds per square kilometre | -2.3% |
| 1990 | 0.0099 one-year-olds per square kilometre | -3.3% |
| 1991 | 0.0094 one-year-olds per square kilometre | -5.8% |
| 1992 | 0.0171 one-year-olds per square kilometre | +83.0% |
| 1993 | 0.016 one-year-olds per square kilometre | -7.0% |
| 1994 | 0.0535 one-year-olds per square kilometre | +235.4% |
| 1995 | 0.0288 one-year-olds per square kilometre | -46.1% |
| 1996 | 0.0332 one-year-olds per square kilometre | +15.3% |
| 1997 | 0.0379 one-year-olds per square kilometre | +13.9% |
| 1998 | 0.0297 one-year-olds per square kilometre | -21.5% |
| 1999 | 0.0225 one-year-olds per square kilometre | -24.2% |
| 2000 | 0.0418 one-year-olds per square kilometre | +85.6% |
| 2001 | 0.0369 one-year-olds per square kilometre | -11.8% |
| 2002 | 0.0426 one-year-olds per square kilometre | +15.5% |
| 2003 | 0.0241 one-year-olds per square kilometre | -43.5% |
| 2004 | 0.0301 one-year-olds per square kilometre | +25.2% |
| 2005 | 0.0247 one-year-olds per square kilometre | -17.9% |
| 2006 | 0.0317 one-year-olds per square kilometre | +28.2% |
| 2007 | 0.0325 one-year-olds per square kilometre | +2.5% |
| 2008 | 0.0333 one-year-olds per square kilometre | +2.5% |
| 2009 | 0.0408 one-year-olds per square kilometre | +22.5% |
| 2010 | 0.0419 one-year-olds per square kilometre | +2.9% |
| 2011 | 0.0342 one-year-olds per square kilometre | -18.5% |
| 2012 | 0.0322 one-year-olds per square kilometre | -5.7% |
| 2013 | 0.0312 one-year-olds per square kilometre | -3.1% |
| 2014 | 0.0729 one-year-olds per square kilometre | +133.6% |
| 2015 | 0.0548 one-year-olds per square kilometre | -24.9% |
| 2016 | 0.049 one-year-olds per square kilometre | -10.6% |
| 2017 | 0.0481 one-year-olds per square kilometre | -1.6% |
| 2018 | 0.0477 one-year-olds per square kilometre | -1.0% |
| 2019 | 0.0409 one-year-olds per square kilometre | -14.2% |
| 2020 | 0.0515 one-year-olds per square kilometre | +25.9% |
| 2021 | 0.0614 one-year-olds per square kilometre | +19.2% |
| 2022 | 0.0491 one-year-olds per square kilometre | -20.1% |
| 2023 | 0.0454 one-year-olds per square kilometre | -7.6% |
Bulgaria compared with similar countries
- Bulgaria's 0.0454 one-year-olds per square kilometre is below the median for high income countries, which is 0.048 one-year-olds per square kilometre, 94% of the median. (63 countries reporting)
- Bulgaria's 0.0454 one-year-olds per square kilometre is below the median for Europe & Central Asia, which is 0.0516 one-year-olds per square kilometre, 88% of the median. (51 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Bulgaria 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 |
|---|---|---|---|
| 1994 | +235.4% | 0.016 one-year-olds per square kilometre | 0.0535 one-year-olds per square kilometre |
| 2014 | +133.6% | 0.0312 one-year-olds per square kilometre | 0.0729 one-year-olds per square kilometre |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.0122 one-year-olds per square kilometre | 0.0103 one-year-olds per square kilometre | 0.0239 one-year-olds per square kilometre | 10 |
| 1990s | 0.0258 one-year-olds per square kilometre | 0.0094 one-year-olds per square kilometre | 0.0535 one-year-olds per square kilometre | 10 |
| 2000s | 0.0338 one-year-olds per square kilometre | 0.0241 one-year-olds per square kilometre | 0.0426 one-year-olds per square kilometre | 10 |
| 2010s | 0.0453 one-year-olds per square kilometre | 0.0312 one-year-olds per square kilometre | 0.0729 one-year-olds per square kilometre | 10 |
| 2020s | 0.0518 one-year-olds per square kilometre | 0.0454 one-year-olds per square kilometre | 0.0614 one-year-olds per square kilometre | 4 |
Countries ranked near Bulgaria
- 136 Estonia 0.0478 one-year-olds per square kilometre compare
- 137 Denmark 0.0463 one-year-olds per square kilometre compare
- 138 Slovakia 0.0461 one-year-olds per square kilometre compare
- 140 Belize 0.0445 one-year-olds per square kilometre compare
- 141 Japan 0.0439 one-year-olds per square kilometre compare
- 142 Croatia 0.0431 one-year-olds per square kilometre compare
More health data for Bulgaria
- Un projection of annual infant deaths, annual growth rate -2.5 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate -0.615 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,422 deaths per 1,000 people (2090)
- Number of infants who die before age 1 39 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2025)
- Population ages 00-04, female, annual growth rate 0.2564 % 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 0.0222 units per person (2025)
- Population ages 00-04, male, annual growth rate 0.3643 % 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 Bulgaria?
- Number of one-year-olds who are not vaccinated against diphtheria in Bulgaria was 0.0454 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 Bulgaria?
- The highest recorded value was 0.0729 one-year-olds per square kilometre in 2014.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Bulgaria?
- The lowest recorded value was 0.0094 one-year-olds per square kilometre in 1991.
- How does Bulgaria rank for number of one-year-olds who are not vaccinated against diphtheria?
- Bulgaria ranks 139th out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Bulgaria?
- Over the last ten years it is up 45.3%. The long-run trend across the full record is volatile.
- Where does this Bulgaria 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.