| 2019 | 2020 | 2021 | 2022 | 2023 | Change 23/22 | % Change 23/22 | Avg. Gr. (%) | Mean | SD | Min | Max | CV | Share in 2023 (%) | |
| Algeria | 1.02 | 0.90 | 0.91 | 1.02 | 0.97 | -0.05 | -4.65 | -1.25 | 0.97 | 0.06 | 0.90 | 1.02 | 0.06 | 2.33 |
| Congo | 0.33 | 0.30 | 0.27 | 0.26 | 0.27 | 0.01 | 3.71 | -4.72 | 0.29 | 0.03 | 0.26 | 0.33 | 0.10 | 0.65 |
| Equatorial Guinea | 0.11 | 0.11 | 0.09 | 0.08 | 0.05 | -0.03 | -32.49 | -15.88 | 0.09 | 0.02 | 0.05 | 0.11 | 0.26 | 0.13 |
| Gabon | 0.22 | 0.21 | 0.18 | 0.19 | 0.22 | 0.03 | 17.14 | 0.61 | 0.20 | 0.02 | 0.18 | 0.22 | 0.09 | 0.53 |
| IR Iran | 2.36 | 1.99 | 2.39 | 2.55 | 2.86 | 0.30 | 11.94 | 4.88 | 2.43 | 0.32 | 1.99 | 2.86 | 0.13 | 6.85 |
| Iraq | 4.58 | 4.00 | 3.97 | 4.45 | 4.12 | -0.33 | -7.52 | -2.61 | 4.22 | 0.28 | 3.97 | 4.58 | 0.07 | 9.86 |
| Kuwait<sup>1</sup> | 2.68 | 2.44 | 2.41 | 2.71 | 2.59 | -0.12 | -4.32 | -0.83 | 2.57 | 0.13 | 2.41 | 2.71 | 0.05 | 6.20 |
| Libya | 1.09 | 0.39 | 1.21 | 0.98 | 1.19 | 0.21 | 21.13 | 2.17 | 0.97 | 0.34 | 0.39 | 1.21 | 0.35 | 2.85 |
| Nigeria | 1.74 | 1.49 | 1.32 | 1.14 | 1.19 | 0.05 | 4.30 | -9.09 | 1.38 | 0.24 | 1.14 | 1.74 | 0.18 | 2.84 |
| Saudi Arabia<sup>1</sup> | 9.81 | 9.21 | 9.12 | 10.59 | 9.61 | -0.98 | -9.30 | -0.52 | 9.67 | 0.59 | 9.12 | 10.59 | 0.06 | 23.01 |
| UAE | 3.06 | 2.78 | 2.72 | 3.06 | 2.94 | -0.12 | -3.91 | -0.94 | 2.91 | 0.16 | 2.72 | 3.06 | 0.05 | 7.05 |
| Venezuela | 1.01 | 0.57 | 0.64 | 0.72 | 0.78 | 0.07 | 9.35 | -6.21 | 0.74 | 0.17 | 0.57 | 1.01 | 0.23 | 1.88 |
| OPEC | 28.00 | 24.39 | 25.24 | 27.76 | 26.80 | -0.96 | -3.46 | -1.09 | 26.44 | 1.58 | 24.39 | 28.00 | 0.06 | 64.18 |
| Azerbaijan | 0.68 | 0.61 | 0.59 | 0.56 | 0.50 | -0.05 | -9.69 | -7.15 | 0.59 | 0.06 | 0.50 | 0.68 | 0.11 | 1.21 |
| Bahrain | 0.19 | 0.20 | 0.19 | 0.19 | 0.18 | -0.01 | -3.32 | -1.44 | 0.19 | 0.00 | 0.18 | 0.20 | 0.03 | 0.44 |
| Brunei | 0.10 | 0.08 | 0.08 | 0.07 | 0.07 | 0.00 | -4.56 | -9.29 | 0.08 | 0.01 | 0.07 | 0.10 | 0.16 | 0.16 |
| Kazakhstan | 1.59 | 1.47 | 1.49 | 1.46 | 1.57 | 0.10 | 7.04 | -0.32 | 1.52 | 0.06 | 1.46 | 1.59 | 0.04 | 3.75 |
| Malaysia | 0.51 | 0.46 | 0.42 | 0.40 | 0.37 | -0.02 | -6.08 | -7.35 | 0.43 | 0.05 | 0.37 | 0.51 | 0.12 | 0.89 |
| Mexico | 1.68 | 1.66 | 1.66 | 1.62 | 1.65 | 0.03 | 1.89 | -0.38 | 1.66 | 0.02 | 1.62 | 1.68 | 0.01 | 3.96 |
| Oman | 0.84 | 0.76 | 0.75 | 0.85 | 0.81 | -0.03 | -3.95 | -0.78 | 0.80 | 0.04 | 0.75 | 0.85 | 0.06 | 1.95 |
| Russia | 10.39 | 9.41 | 9.62 | 9.76 | 9.59 | -0.16 | -1.68 | -1.98 | 9.75 | 0.38 | 9.41 | 10.39 | 0.04 | 22.97 |
| Sudans | 0.24 | 0.23 | 0.22 | 0.21 | 0.20 | -0.01 | -2.71 | -4.13 | 0.22 | 0.02 | 0.20 | 0.24 | 0.07 | 0.48 |
| Non-OPEC DoC | 16.21 | 14.88 | 15.03 | 15.11 | 14.96 | -0.16 | -1.04 | -2.00 | 15.24 | 0.55 | 14.88 | 16.21 | 0.04 | 35.82 |
| DoC | 44.22 | 39.27 | 40.27 | 42.87 | 41.75 | -1.12 | -2.60 | -1.42 | 41.68 | 1.98 | 39.27 | 44.22 | 0.05 | 100.00 |