Annual percentage change in primary energy from hydropower in Bulgaria
Bulgaria: Annual percentage change in primary energy from hydropower was -0.2% in 2025. ◆ Volatile
Annual percentage change in primary energy from hydropower in Bulgaria, 1966–2025
Source: Energy Institute – Statistical Review of World Energy (2026) – with major processing by Our World in Data. Measured in %.
Analysis
In 2025, annual percentage change in primary energy from hydropower in Bulgaria stood at -0.2%.
Compared with earlier readings it is up 98.3% on the previous year and down 100.7% over ten years.
Over the whole period, annual percentage change in primary energy from hydropower in Bulgaria peaked at 82.0% in 2018 and was at its lowest, -43.1%, in 2019.
That places Bulgaria 27th out of 71 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.
Annual percentage change in primary energy from hydropower in Bulgaria, year by year
| Year | % | Change |
|---|---|---|
| 1966 | 0.5% | — |
| 1967 | 0.6% | +19.4% |
| 1968 | -35.5% | -6039.5% |
| 1969 | 40.9% | -215.4% |
| 1970 | 17.0% | -58.4% |
| 1971 | 0.8% | -95.1% |
| 1972 | -3.5% | -513.2% |
| 1973 | 22.7% | -756.0% |
| 1974 | -19.1% | -184.1% |
| 1975 | 17.9% | -194.1% |
| 1976 | 20.4% | +13.9% |
| 1977 | 19.5% | -4.7% |
| 1978 | -17.6% | -190.3% |
| 1979 | 13.8% | -178.7% |
| 1980 | 12.1% | -12.1% |
| 1981 | -2.6% | -121.1% |
| 1982 | -15.7% | +513.6% |
| 1983 | 9.9% | -163.3% |
| 1984 | -2.8% | -127.9% |
| 1985 | -31.4% | +1031.4% |
| 1986 | 4.0% | -112.7% |
| 1987 | 9.1% | +128.0% |
| 1988 | 2.3% | -74.4% |
| 1989 | 3.7% | +57.4% |
| 1990 | -39.4% | -1177.4% |
| 1991 | 39.1% | -199.3% |
| 1992 | -16.1% | -141.1% |
| 1993 | -6.1% | -62.1% |
| 1994 | -27.5% | +350.8% |
| 1995 | 67.7% | -346.6% |
| 1996 | 32.8% | -51.5% |
| 1997 | -5.7% | -117.3% |
| 1998 | 12.6% | -322.4% |
| 1999 | -11.0% | -186.7% |
| 2000 | -3.7% | -66.2% |
| 2001 | -37.2% | +907.5% |
| 2002 | 28.2% | -175.6% |
| 2003 | 41.5% | +47.5% |
| 2004 | 4.8% | -88.4% |
| 2005 | 36.9% | +668.7% |
| 2006 | -2.0% | -105.3% |
| 2007 | -32.8% | +1570.6% |
| 2008 | -1.3% | -96.0% |
| 2009 | 22.9% | -1843.5% |
| 2010 | 46.6% | +103.7% |
| 2011 | -42.9% | -192.1% |
| 2012 | 10.7% | -124.8% |
| 2013 | 27.0% | +153.5% |
| 2014 | 14.0% | -48.1% |
| 2015 | 22.9% | +63.3% |
| 2016 | -31.4% | -237.2% |
| 2017 | -27.1% | -13.6% |
| 2018 | 82.0% | -402.4% |
| 2019 | -43.1% | -152.5% |
| 2020 | -3.7% | -91.4% |
| 2021 | 70.9% | -2002.9% |
| 2022 | -21.1% | -129.7% |
| 2023 | -19.0% | -9.8% |
| 2024 | -9.5% | -50.0% |
| 2025 | -0.2% | -98.3% |
Bulgaria compared with similar countries
- Bulgaria's -0.2% is above the median for high income countries, which is -12.6%, 1% of the median. (38 countries reporting)
- Bulgaria's -0.2% is above the median for Europe & Central Asia, which is -13.7%, 1% of the median. (38 countries reporting)
Biggest year-on-year movements
Years where Annual percentage change in primary energy from hydropower 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 |
|---|---|---|---|
| 1968 | -6039.5% | 0.6% | -35.5% |
| 2021 | +2002.9% | -3.7% | 70.9% |
| 2009 | +1843.5% | -1.3% | 22.9% |
| 2007 | -1570.6% | -2.0% | -32.8% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1960s | 1.6% | -35.5% | 40.9% | 4 |
| 1970s | 7.2% | -19.1% | 22.7% | 10 |
| 1980s | -1.1% | -31.4% | 12.1% | 10 |
| 1990s | 4.7% | -39.4% | 67.7% | 10 |
| 2000s | 5.7% | -37.2% | 41.5% | 10 |
| 2010s | 5.9% | -43.1% | 82.0% | 10 |
| 2020s | 2.9% | -21.1% | 70.9% | 6 |
Countries ranked near Bulgaria
More reference data data for Bulgaria
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.3067 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.2728 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 1.73 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 0.2506 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 1.73 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 1.03 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.608 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 1.02 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 7.74 (2050)
- Emission Totals - Emissions (N2O) - Crop Residues 1.36 (2050)
Frequently asked questions
- What is annual percentage change in primary energy from hydropower in Bulgaria?
- Annual percentage change in primary energy from hydropower in Bulgaria was -0.2% in 2025, according to Energy Institute – Statistical Review of World Energy (2026) – with major processing by Our World in Data.
- What is the highest annual percentage change in primary energy from hydropower recorded in Bulgaria?
- The highest recorded value was 82.0% in 2018.
- What is the lowest annual percentage change in primary energy from hydropower recorded in Bulgaria?
- The lowest recorded value was -43.1% in 2019.
- How does Bulgaria rank for annual percentage change in primary energy from hydropower?
- Bulgaria ranks 27th out of 71 countries with data for 2025.
- Is annual percentage change in primary energy from hydropower rising or falling in Bulgaria?
- Over the last ten years it is down 100.7%. The long-run trend across the full record is volatile.
- Where does this Bulgaria data come from?
- The figures come from Energy Institute – Statistical Review of World Energy (2026) – with major processing by Our World in Data, published as part of Annual percentage change in primary energy from hydropower. Statizoid updates them automatically from the source API.
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About this data
Percentage change in total energy supply relative to the previous year.