Bulgaria vs Slovenia: Share of primary energy from fossil fuels
Bulgaria
66.5%
in 2025
Slovenia
63.2%
in 2025
Bulgaria rank
66th
Slovenia rank
68th
Share of primary energy from fossil fuels over time
- Bulgaria
- Slovenia
How they compare
Bulgaria currently reports 66.5% against 63.2% in Slovenia, a difference of 3.3%.
That makes Bulgaria's figure about 1.1 times Slovenia's.
The two have swapped places 4 times across 36 shared years of data; in 1990 it was Bulgaria ahead.
Bulgaria ranks 66th and Slovenia ranks 68th of 76 countries.
Bulgaria has averaged higher in every one of the 4 decades both report.
Head to head by decade
| Decade | Bulgaria | Slovenia | Difference | Ahead |
|---|---|---|---|---|
| 1990s | 81.0% | 74.4% | 6.5% | Bulgaria |
| 2000s | 74.8% | 73.5% | 1.2% | Bulgaria |
| 2010s | 73.1% | 68.9% | 4.2% | Bulgaria |
| 2020s | 67.6% | 64.1% | 3.5% | Bulgaria |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher share of primary energy from fossil fuels, Bulgaria or Slovenia?
- Bulgaria, at 66.5% against 63.2% in Slovenia as of 2025.
- What is the difference in share of primary energy from fossil fuels between Bulgaria and Slovenia?
- 3.3%, with Bulgaria 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 share of primary energy from fossil fuels?
- Bulgaria ranks 66th and Slovenia ranks 68th of 76 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 Share of primary energy from fossil fuels. 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.