Table 1 Descriptive statistics

Mean

3.23476

23.48421

31,168,222

24.58947

57.2961

38.10093

Median

4.217446

26.1000

36,520,734

29.7000

9.980174

37.79074

Maximum

15.32916

56.2000

59,035,065

38.7000

257.7200

89.38105

Minimum

 − 13.12788

1.00000

100.0000

0.10000

0.010000

14.90391

Std. dev

5.53699

16.93652

20,351,732

14.77481

81.94652

18.79616

Skewness

 − 0.903043

 − 0.097389

 − 0.608474

 − 0.748476

1.29698

0.92482

Kurtosis

4.583375

1.853509

1.943302

1.917229

3.19884

3.705407

Jarque–Bera

9.134286

2.141268

4.112824

5.404327

10.71626

6.204711

Probability

0.010388

0.342791

0.127912

0.06706

0.00471

0.044943

Sum

122.9209

892.400

1.18E + 09

934.400

2177.252

1447.835

Sum Sq. dev

1134.356

10,613.29

1.53E + 16

8076.916

248,463.6

13,071.94

Observations

38

38

38

38

38

38