| 2019 | 2020 | 2021 | 2022 | 2023 | Change 23/22 | % Change 23/22 | Avg. Gr. (%) | Mean | SD | Min | Max | CV | Share in 2023 (%) | |
| Algeria | 12.20 | 12.20 | 12.20 | 12.20 | 12.20 | 0.00 | 0.00 | 0.00 | 12.20 | 0.00 | 12.20 | 12.20 | 0.00 | 0.98 |
| Congo | 1.95 | 1.81 | 1.81 | 1.81 | 1.81 | 0.00 | 0.00 | -1.79 | 1.84 | 0.06 | 1.81 | 1.95 | 0.03 | 0.15 |
| Equatorial Guinea | 1.10 | 1.10 | 1.10 | 1.10 | 1.10 | 0.00 | 0.00 | 0.00 | 1.10 | 0.00 | 1.10 | 1.10 | 0.00 | 0.09 |
| Gabon | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 0.00 | 0.00 | 0.00 | 2.00 | 0.00 | 2.00 | 2.00 | 0.00 | 0.16 |
| IR Iran | 208.60 | 208.60 | 208.60 | 208.60 | 208.60 | 0.00 | 0.00 | 0.00 | 208.60 | 0.00 | 208.60 | 208.60 | 0.00 | 16.80 |
| Iraq | 145.02 | 145.02 | 145.02 | 145.02 | 145.02 | 0.00 | 0.00 | 0.00 | 145.02 | 0.00 | 145.02 | 145.02 | 0.00 | 11.68 |
| Kuwait | 101.50 | 101.50 | 101.50 | 101.50 | 101.50 | 0.00 | 0.00 | 0.00 | 101.50 | 0.00 | 101.50 | 101.50 | 0.00 | 8.18 |
| Libya | 48.36 | 48.36 | 48.36 | 48.36 | 48.36 | 0.00 | 0.00 | 0.00 | 48.36 | 0.00 | 48.36 | 48.36 | 0.00 | 3.90 |
| Nigeria | 36.89 | 36.91 | 37.05 | 36.97 | 37.50 | 0.53 | 1.44 | 0.41 | 37.06 | 0.25 | 36.89 | 37.50 | 0.01 | 3.02 |
| Saudi Arabia | 267.07 | 267.08 | 267.19 | 267.19 | 267.23 | 0.04 | 0.01 | 0.01 | 267.15 | 0.07 | 267.07 | 267.23 | 0.00 | 21.53 |
| United Arab Emirates | 105.00 | 107.00 | 111.00 | 113.00 | 113.00 | 0.00 | 0.00 | 1.85 | 109.80 | 3.63 | 105.00 | 113.00 | 0.03 | 9.10 |
| Venezuela | 303.81 | 303.56 | 303.47 | 303.22 | 303.01 | -0.21 | -0.07 | -0.07 | 303.41 | 0.31 | 303.01 | 303.81 | 0.00 | 24.41 |
| Total OPEC | 1233.50 | 1235.15 | 1239.30 | 1240.97 | 1241.33 | 0.36 | 0.03 | 0.16 | 1238.05 | 3.54 | 1233.50 | 1241.33 | 0.00 | 100.00 |