Variable

Mean

Std. Dev

Min

Max

NRW

2,028,907

791,852.9

119,300

3,087,219

Cost

1,984,720

823,025.7

393,902.8

3,212,983

Production

4,819,183

973,180.6

2,516,950

5,874,646

Revenue

11,225,068

3,977,633

3,794,197

1.70e+07