Year-to-year change in primary energy from fossil fuels vs. in Iran
Iran: Year-to-year change in primary energy from fossil fuels vs. was -10.67 terawatt-hours in 2025. ◆ Volatile
Latest (2025)
-10.67 terawatt-hours
Change on year
down 341.9%
World rank
75th
of 80 countries
All-time high
22.81 terawatt-hours
in 2019
All-time low
-17.8 terawatt-hours
in 2021
Years of data
60
1966–2025
Year-to-year change in primary energy from fossil fuels vs. low-carbon energy in Iran, 1966–2025
Source: Energy Institute – Statistical Review of World Energy (2026) – with major processing by Our World in Data. Measured in terawatt-hours.
Analysis
The most recent figure for year-to-year change in primary energy from fossil fuels vs. low-carbon energy in Iran is -10.67 terawatt-hours, measured in 2025.
That represents a change of down 341.9% on the previous year and down 239.8% over ten years.
Over the whole period, year-to-year change in primary energy from fossil fuels vs. low-carbon energy in Iran peaked at 22.81 terawatt-hours in 2019 and was at its lowest, -17.8 terawatt-hours, in 2021.
That places Iran 75th out of 80 countries with data for 2025, putting it in the bottom quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Year-to-year change in primary energy from fossil fuels vs. in Iran, year by year
| Year | terawatt-hours | Change |
|---|---|---|
| 1966 | 0.1282 terawatt-hours | — |
| 1967 | 0.1414 terawatt-hours | +10.3% |
| 1968 | 0.1503 terawatt-hours | +6.3% |
| 1969 | 0.1635 terawatt-hours | +8.8% |
| 1970 | 0.1768 terawatt-hours | +8.1% |
| 1971 | 0.1856 terawatt-hours | +5.0% |
| 1972 | 0.8353 terawatt-hours | +350.0% |
| 1973 | -0.5347 terawatt-hours | -164.0% |
| 1974 | 0.3005 terawatt-hours | -156.2% |
| 1975 | 0.1635 terawatt-hours | -45.6% |
| 1976 | 0.4066 terawatt-hours | +148.6% |
| 1977 | 0.1282 terawatt-hours | -68.5% |
| 1978 | 2.25 terawatt-hours | +1651.7% |
| 1979 | -0.8264 terawatt-hours | -136.8% |
| 1980 | 0.1989 terawatt-hours | -124.1% |
| 1981 | 0.5127 terawatt-hours | +157.8% |
| 1982 | 0.3005 terawatt-hours | -41.4% |
| 1983 | -0.137 terawatt-hours | -145.6% |
| 1984 | -0.4066 terawatt-hours | +196.8% |
| 1985 | 0.0477 terawatt-hours | -111.7% |
| 1986 | 1.15 terawatt-hours | +2312.3% |
| 1987 | 0.766 terawatt-hours | -33.4% |
| 1988 | 0.43 terawatt-hours | -43.9% |
| 1989 | -1.51 terawatt-hours | -452.1% |
| 1990 | 0.649 terawatt-hours | -142.9% |
| 1991 | -1.77 terawatt-hours | -373.3% |
| 1992 | 3.6 terawatt-hours | -302.8% |
| 1993 | 1.33 terawatt-hours | -63.1% |
| 1994 | -3.64 terawatt-hours | -373.7% |
| 1995 | 1.43 terawatt-hours | -139.2% |
| 1996 | 0.491 terawatt-hours | -65.6% |
| 1997 | -2.87 terawatt-hours | -685.1% |
| 1998 | 1.55 terawatt-hours | -153.8% |
| 1999 | -2.31 terawatt-hours | -249.3% |
| 2000 | -1.36 terawatt-hours | -41.1% |
| 2001 | 0.3382 terawatt-hours | -124.9% |
| 2002 | 3.89 terawatt-hours | +1049.2% |
| 2003 | 1.57 terawatt-hours | -59.5% |
| 2004 | 2.36 terawatt-hours | +50.2% |
| 2005 | 2.54 terawatt-hours | +7.4% |
| 2006 | 4.12 terawatt-hours | +62.1% |
| 2007 | -0.5344 terawatt-hours | -113.0% |
| 2008 | -10.47 terawatt-hours | +1858.5% |
| 2009 | -0.6793 terawatt-hours | -93.5% |
| 2010 | 3.5 terawatt-hours | -614.9% |
| 2011 | 0.8352 terawatt-hours | -76.1% |
| 2012 | 5.97 terawatt-hours | +614.2% |
| 2013 | 10.54 terawatt-hours | +76.8% |
| 2014 | -0.6195 terawatt-hours | -105.9% |
| 2015 | -3.14 terawatt-hours | +407.2% |
| 2016 | 11.23 terawatt-hours | -457.5% |
| 2017 | 3.53 terawatt-hours | -68.6% |
| 2018 | -7.04 terawatt-hours | -299.8% |
| 2019 | 22.81 terawatt-hours | -423.7% |
| 2020 | -10.39 terawatt-hours | -145.6% |
| 2021 | -17.8 terawatt-hours | +71.3% |
| 2022 | 9.47 terawatt-hours | -153.2% |
| 2023 | 9.02 terawatt-hours | -4.8% |
| 2024 | -2.42 terawatt-hours | -126.8% |
| 2025 | -10.67 terawatt-hours | +341.9% |
Iran compared with similar countries
- Iran's -10.67 terawatt-hours is below the median for upper middle income countries, which is 1.77 terawatt-hours. (24 countries reporting)
- Iran's -10.67 terawatt-hours is below the median for Middle East, North Africa, Afghanistan & Pakistan, which is 2.06 terawatt-hours. (12 countries reporting)
Biggest year-on-year movements
Years where Year-to-year change in primary energy from fossil fuels vs. in Iran 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 |
|---|---|---|---|
| 1986 | +2312.3% | 0.0477 terawatt-hours | 1.15 terawatt-hours |
| 2008 | -1858.5% | -0.5344 terawatt-hours | -10.47 terawatt-hours |
| 1978 | +1651.7% | 0.1282 terawatt-hours | 2.25 terawatt-hours |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1960s | 0.1458 terawatt-hours | 0.1282 terawatt-hours | 0.1635 terawatt-hours | 4 |
| 1970s | 0.308 terawatt-hours | -0.8264 terawatt-hours | 2.25 terawatt-hours | 10 |
| 1980s | 0.1349 terawatt-hours | -1.51 terawatt-hours | 1.15 terawatt-hours | 10 |
| 1990s | -0.1554 terawatt-hours | -3.64 terawatt-hours | 3.6 terawatt-hours | 10 |
| 2000s | 0.1777 terawatt-hours | -10.47 terawatt-hours | 4.12 terawatt-hours | 10 |
| 2010s | 4.76 terawatt-hours | -7.04 terawatt-hours | 22.81 terawatt-hours | 10 |
| 2020s | -3.8 terawatt-hours | -17.8 terawatt-hours | 9.47 terawatt-hours | 6 |
Countries ranked near Iran
More climate change data for Iran
- Spring temperature anomalies 0.0713 °C (2026)
- Summer temperature anomalies 1.08 °C (2026)
- Temperature anomalies by month 0.2419 °C (2026)
- Share of global CO₂ emissions and population 0.8% (2100)
- Population, total, annual growth rate 0.9283 % change on previous year (2025)
- Population, total, per unit of GDP 0.0003 units per US$ of GDP (2025)
- Urban population, annual growth rate 1.39 % change on previous year (2025)
- Urban population, per unit of GDP 0.0002 units per US$ of GDP (2025)
- Urban population, per capita 0.7738 units per person (2025)
- Precipitation anomalies, annual growth rate -620.65 % change on previous year (2025)
Frequently asked questions
- What is year-to-year change in primary energy from fossil fuels vs. low-carbon energy in Iran?
- Year-to-year change in primary energy from fossil fuels vs. low-carbon energy in Iran was -10.67 terawatt-hours in 2025, according to Energy Institute – Statistical Review of World Energy (2026) – with major processing by Our World in Data.
- What is the highest year-to-year change in primary energy from fossil fuels vs. low-carbon energy recorded in Iran?
- The highest recorded value was 22.81 terawatt-hours in 2019.
- What is the lowest year-to-year change in primary energy from fossil fuels vs. low-carbon energy recorded in Iran?
- The lowest recorded value was -17.8 terawatt-hours in 2021.
- How does Iran rank for year-to-year change in primary energy from fossil fuels vs. low-carbon energy?
- Iran ranks 75th out of 80 countries with data for 2025.
- Is year-to-year change in primary energy from fossil fuels vs. low-carbon energy rising or falling in Iran?
- Over the last ten years it is down 239.8%. The long-run trend across the full record is volatile.
- Where does this Iran 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 Year-to-year change in primary energy from fossil fuels vs. low-carbon energy. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 60 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Change in total energy supply relative to the previous year, measured in terawatt-hours.