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