| 2019 | 2020 | 2021 | 2022 | 2023 | Change 23/22 | % Change 23/22 | Avg. Gr. (%) | Mean | SD | Min | Max | CV | Share in 2023 (%) | |
| Algeria | 43.42 | 44.24 | 45.02 | 45.80 | 46.55 | 0.75 | 1.64 | 1.64 | 45.01 | 1.24 | 43.42 | 46.55 | 0.03 | 9.38 |
| Congo | 5.57 | 5.70 | 5.84 | 5.97 | 6.14 | 0.17 | 2.81 | 2.81 | 5.84 | 0.22 | 5.57 | 6.14 | 0.04 | 1.24 |
| Equatorial Guinea | 1.36 | 1.41 | 1.45 | 1.50 | 1.54 | 0.05 | 3.07 | 3.07 | 1.45 | 0.07 | 1.36 | 1.54 | 0.05 | 0.31 |
| Gabon | 2.08 | 2.11 | 2.14 | 2.16 | 2.21 | 0.05 | 2.22 | 2.22 | 2.14 | 0.05 | 2.08 | 2.21 | 0.02 | 0.44 |
| IR Iran | 83.08 | 84.04 | 84.84 | 85.69 | 86.55 | 0.86 | 1.00 | 1.00 | 84.84 | 1.36 | 83.08 | 86.55 | 0.02 | 17.43 |
| Iraq | 39.13 | 40.15 | 41.19 | 42.25 | 43.32 | 1.08 | 2.54 | 2.54 | 41.21 | 1.66 | 39.13 | 43.32 | 0.04 | 8.73 |
| Kuwait | 4.78 | 4.67 | 4.63 | 4.74 | 4.86 | 0.12 | 2.60 | 2.60 | 4.73 | 0.09 | 4.63 | 4.86 | 0.02 | 0.98 |
| Libya | 6.58 | 6.64 | 6.71 | 6.78 | 6.85 | 0.07 | 1.00 | 1.00 | 6.71 | 0.11 | 6.58 | 6.85 | 0.02 | 1.38 |
| Nigeria | 208.28 | 213.40 | 218.40 | 221.60 | 222.18 | 0.58 | 0.26 | 0.26 | 216.77 | 5.89 | 208.28 | 222.18 | 0.03 | 44.75 |
| Saudi Arabia | 30.06 | 31.55 | 30.78 | 32.18 | 32.82 | 0.64 | 2.00 | 2.00 | 31.48 | 1.09 | 30.06 | 32.82 | 0.03 | 6.61 |
| United Arab Emirates | 9.50 | 9.28 | 9.56 | 9.64 | 9.71 | 0.08 | 0.81 | 0.81 | 9.54 | 0.16 | 9.28 | 9.71 | 0.02 | 1.96 |
| Venezuela | 32.22 | 32.61 | 32.99 | 33.36 | 33.73 | 0.37 | 1.11 | 1.11 | 32.98 | 0.60 | 32.22 | 33.73 | 0.02 | 6.79 |
| Total OPEC | 466.06 | 475.81 | 483.55 | 491.65 | 496.46 | 4.81 | 0.98 | 0.98 | 482.71 | 12.19 | 466.06 | 496.46 | 0.03 | 100.00 |