Group | Variable | Unit | Observation | Mean | S.D. | Min | Max |
| q | billion | 140 | 1113.79 | 815.90 | 65.79 | 3378.15 |
| u | 104 ton | 140 | 15,843.89 | 10,957.44 | 820.62 | 45,390 |
East | k | billion | 140 | 1113.25 | 727.95 | 102.58 | 3163.40 |
| e | 104 ton Standard coal | 140 | 1749.75 | 1170.69 | 52.54 | 4182.77 |
| l | 104 person | 140 | 9.55 | 5.71 | 1.17 | 23.24 |
| q | billion | 60 | 740.97 | 380.20 | 361.57 | 1766.58 |
| u | 104 ton | 60 | 17,459.83 | 10,212.42 | 4620.67 | 42,009 |
Middle | k | billion | 60 | 1227.23 | 665.02 | 374.65 | 2574.73 |
| e | 104 ton Standard coal | 60 | 1705.27 | 617.22 | 557.57 | 3089.09 |
| l | 104 person | 60 | 11.11 | 3.80 | 5.14 | 20.62 |
| q | billion | 100 | 341.15 | 181.05 | 91.12 | 690.14 |
| u | 104 ton | 100 | 7204.80 | 3674.29 | 970.76 | 21100 |
West | k | billion | 100 | 537.67 | 315.20 | 181.3 | 1408.91 |
| e | 104 ton Standard coal | 100 | 836.37 | 385.99 | 72.09 | 1780.21 |
| l | 104 person | 100 | 7.11 | 3.97 | 0.92 | 20.59 |