Pertussis - number of reported cases, annual growth rate in Bulgaria
Bulgaria: Pertussis - number of reported cases, annual growth rate was -96.77 % change on previous year in 2025. ◆ Volatile
Pertussis - number of reported cases, annual growth rate in Bulgaria, 1975–2025
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
The most recent figure for pertussis - number of reported cases, annual growth rate in Bulgaria is -96.77 % change on previous year, measured in 2025. That is the lowest value across all 50 years on record.
The figure is down 648.3% on the previous year and down 196.0% over ten years.
Over the whole period, pertussis - number of reported cases, annual growth rate in Bulgaria peaked at 887.94 % change on previous year in 1977 and was at its lowest, -96.77 % change on previous year, in 2025.
That places Bulgaria 112th out of 191 countries with data for 2025, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Pertussis - number of reported cases, annual growth rate in Bulgaria, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1975 | -93.72 % change on previous year | — |
| 1976 | -70.99 % change on previous year | -24.3% |
| 1977 | 887.94 % change on previous year | -1350.8% |
| 1978 | -34.75 % change on previous year | -103.9% |
| 1979 | -84.05 % change on previous year | +141.9% |
| 1980 | 6.21 % change on previous year | -107.4% |
| 1981 | 153.9 % change on previous year | +2379.4% |
| 1982 | -56.78 % change on previous year | -136.9% |
| 1983 | -60.95 % change on previous year | +7.3% |
| 1984 | 242.42 % change on previous year | -497.8% |
| 1985 | -82.3 % change on previous year | -133.9% |
| 1986 | 32.5 % change on previous year | -139.5% |
| 1987 | 1.89 % change on previous year | -94.2% |
| 1988 | -74.07 % change on previous year | -4025.9% |
| 1989 | 7.14 % change on previous year | -109.6% |
| 1990 | 73.33 % change on previous year | +926.7% |
| 1991 | -50 % change on previous year | -168.2% |
| 1992 | 530.77 % change on previous year | -1161.5% |
| 1993 | -9.76 % change on previous year | -101.8% |
| 1994 | -70.27 % change on previous year | +620.3% |
| 1995 | 250 % change on previous year | -455.8% |
| 1996 | -48.05 % change on previous year | -119.2% |
| 1997 | 10 % change on previous year | -120.8% |
| 1998 | -9.09 % change on previous year | -190.9% |
| 1999 | 207.5 % change on previous year | -2382.5% |
| 2000 | -13.82 % change on previous year | -106.7% |
| 2001 | -23.58 % change on previous year | +70.6% |
| 2002 | 1.23 % change on previous year | -105.2% |
| 2003 | 119.51 % change on previous year | +9580.5% |
| 2004 | 23.33 % change on previous year | -80.5% |
| 2005 | 40.99 % change on previous year | +75.7% |
| 2006 | 7.03 % change on previous year | -82.9% |
| 2007 | -19.7 % change on previous year | -380.3% |
| 2008 | -28.25 % change on previous year | +43.4% |
| 2009 | 30.05 % change on previous year | -206.4% |
| 2010 | -78.49 % change on previous year | -361.2% |
| 2011 | -14.81 % change on previous year | -81.1% |
| 2012 | 121.74 % change on previous year | -921.7% |
| 2013 | -12.75 % change on previous year | -110.5% |
| 2014 | -41.57 % change on previous year | +226.2% |
| 2015 | -32.69 % change on previous year | -21.4% |
| 2016 | 180 % change on previous year | -650.6% |
| 2017 | 18.37 % change on previous year | -89.8% |
| 2018 | -1.72 % change on previous year | -109.4% |
| 2019 | -38.6 % change on previous year | +2138.6% |
| 2020 | -61.43 % change on previous year | +59.2% |
| 2021 | -88.89 % change on previous year | +44.7% |
| 2022 | 466.67 % change on previous year | -625.0% |
| 2023 | 17.65 % change on previous year | -96.2% |
| 2025 | -96.77 % change on previous year | -648.3% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 120.89 % change on previous year | -93.72 % change on previous year | 887.94 % change on previous year | 5 |
| 1980s | 17 % change on previous year | -82.3 % change on previous year | 242.42 % change on previous year | 10 |
| 1990s | 88.44 % change on previous year | -70.27 % change on previous year | 530.77 % change on previous year | 10 |
| 2000s | 13.68 % change on previous year | -28.25 % change on previous year | 119.51 % change on previous year | 10 |
| 2010s | 9.95 % change on previous year | -78.49 % change on previous year | 180 % change on previous year | 10 |
| 2020s | 47.45 % change on previous year | -96.77 % change on previous year | 466.67 % change on previous year | 5 |
Countries ranked near Bulgaria
- 109 Turkey -96.54 % change on previous year compare
- 110 Italy -96.62 % change on previous year compare
- 111 United Kingdom -96.73 % change on previous year compare
- 113 Sao Tome and Principe -97.22 % change on previous year compare
- 114 Spain -97.39 % change on previous year compare
- 115 Solomon Islands -97.44 % change on previous year 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)
- Population ages 80 and above, female, per capita 0.0336 units per person (2025)
- Population ages 80 and above, male, annual growth rate 1.97 % change on previous year (2025)
- Population ages 80 and above, male, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 80 and above, male, per capita 0.0166 units per person (2025)
- Pertussis - number of reported cases, gaps filled 88 (2025)
- Pertussis - number of reported cases, per capita 0 units per person (2025)
Frequently asked questions
- What is pertussis - number of reported cases, annual growth rate in Bulgaria?
- Pertussis - number of reported cases, annual growth rate in Bulgaria was -96.77 % change on previous year in 2025, according to Statizoid (derived).
- What is the highest pertussis - number of reported cases, annual growth rate recorded in Bulgaria?
- The highest recorded value was 887.94 % change on previous year in 1977.
- What is the lowest pertussis - number of reported cases, annual growth rate recorded in Bulgaria?
- The lowest recorded value was -96.77 % change on previous year in 2025.
- How does Bulgaria rank for pertussis - number of reported cases, annual growth rate?
- Bulgaria ranks 112th out of 191 countries with data for 2025.
- Is pertussis - number of reported cases, annual growth rate rising or falling in Bulgaria?
- Over the last ten years it is down 196.0%. 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 Pertussis - number of reported cases, annual growth rate. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 50 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 Pertussis - number of reported cases. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.
Computed from
- Pertussis - number of reported cases World Health Organization, Global Health Observatory
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 Pertussis - number of reported cases. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.