Bulgaria vs Slovenia: Primary energy from fossil fuels, nuclear, and renewables
Bulgaria
24.0%
in 2025
Slovenia
25.7%
in 2025
Bulgaria rank
7th
Slovenia rank
5th
Primary energy from fossil fuels, nuclear, and renewables over time
- Bulgaria
- Slovenia
How they compare
Slovenia currently reports 25.7% against 24.0% in Bulgaria, a difference of 1.7%.
That makes Slovenia's figure about 1.1 times Bulgaria's.
The two have swapped places 10 times across 36 shared years of data; in 1990 it was Slovenia ahead.
Bulgaria ranks 7th and Slovenia ranks 5th of 216 countries.
Across the 4 decades both report, Bulgaria averaged higher in 1 and Slovenia in 3.
Head to head by decade
| Decade | Bulgaria | Slovenia | Difference | Ahead |
|---|---|---|---|---|
| 1990s | 18.2% | 20.6% | 2.4% | Slovenia |
| 2000s | 23.9% | 21.2% | 2.7% | Bulgaria |
| 2010s | 22.6% | 23.3% | 0.7% | Slovenia |
| 2020s | 24.3% | 25.4% | 1.1% | Slovenia |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher primary energy from fossil fuels, nuclear, and renewables, Bulgaria or Slovenia?
- Slovenia, at 25.7% against 24.0% in Bulgaria as of 2025.
- What is the difference in primary energy from fossil fuels, nuclear, and renewables between Bulgaria and Slovenia?
- 1.7%, with Slovenia ahead.
- How many years of comparable data are there for Bulgaria and Slovenia?
- 36 years are reported by both, from 1990 to 2025.
- How do Bulgaria and Slovenia rank globally for primary energy from fossil fuels, nuclear, and renewables?
- Bulgaria ranks 7th and Slovenia ranks 5th of 216 countries.
- Where does this data come from?
- Energy Institute - Statistical Review of World Energy (2026); Smil (2017); U.S. Energy Information Administration (2026) β with major processing by Our World in Data, published as Primary energy from fossil fuels, nuclear, and renewables. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Measured as a percentage of total energy supply.