Year

Mean (%)

Standard deviation (%)

Q1 (%)

Q2 (%)

Q3 (%)

1991

−6.54

38.62

−33.78

0.00

18.32

1993

13.90

39.01

−13.73

16.44

49.34

1997

15.66

38.00

−13.55

14.25

51.68

2000

9.60

39.61

−22.94

9.51

45.91

2004

18.24

30.29

−2.48

17.75

41.68

2006

24.90

24.78

6.80

21.13

41.58