Bulgaria vs Portugal: Annual change in primary energy from hydropower
Bulgaria
-0.0045 terawatt-hours
in 2025
Portugal
-0.022 terawatt-hours
in 2025
Bulgaria rank
37th
Portugal rank
40th
Annual change in primary energy from hydropower over time
- Bulgaria
- Portugal
How they compare
Bulgaria currently reports -0.0045 terawatt-hours against -0.022 terawatt-hours in Portugal, a difference of 0.0175 terawatt-hours.
The two have swapped places 35 times across 60 shared years of data; in 1966 it was Portugal ahead.
Bulgaria ranks 37th and Portugal ranks 40th of 80 countries.
Across the 7 decades both report, Bulgaria averaged higher in 1 and Portugal in 6.
Head to head by decade
| Decade | Bulgaria | Portugal | Difference | Ahead |
|---|---|---|---|---|
| 1960s | -0.0402 terawatt-hours | 0.584 terawatt-hours | 0.6242 terawatt-hours | Portugal |
| 1970s | 0.1472 terawatt-hours | 0.4902 terawatt-hours | 0.343 terawatt-hours | Portugal |
| 1980s | -0.062 terawatt-hours | -0.5394 terawatt-hours | 0.4774 terawatt-hours | Bulgaria |
| 1990s | 0.0041 terawatt-hours | 0.1467 terawatt-hours | 0.1426 terawatt-hours | Portugal |
| 2000s | 0.07 terawatt-hours | 0.0999 terawatt-hours | 0.0299 terawatt-hours | Portugal |
| 2010s | -0.0502 terawatt-hours | 0.0533 terawatt-hours | 0.1035 terawatt-hours | Portugal |
| 2020s | -0.0245 terawatt-hours | 1.01 terawatt-hours | 1.03 terawatt-hours | Portugal |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher annual change in primary energy from hydropower, Bulgaria or Portugal?
- Bulgaria, at -0.0045 terawatt-hours against -0.022 terawatt-hours in Portugal as of 2025.
- What is the difference in annual change in primary energy from hydropower between Bulgaria and Portugal?
- 0.0175 terawatt-hours, with Bulgaria ahead.
- How many years of comparable data are there for Bulgaria and Portugal?
- 60 years are reported by both, from 1966 to 2025.
- How do Bulgaria and Portugal rank globally for annual change in primary energy from hydropower?
- Bulgaria ranks 37th and Portugal ranks 40th of 80 countries.
- Where does this data come from?
- Energy Institute – Statistical Review of World Energy (2026) – with major processing by Our World in Data, published as Annual change in primary energy from hydropower. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Change in total energy supply relative to the previous year, measured in terawatt-hours.