1972
5.20
4.95
3.61
2.30
1.33
3.08
18.8
22
28.5
14
8.19
5.59
1973
6.61
5.66
5.39
2.35
2.43
26.2
29.6
71.1
61.8
78
21.1
11.2
1974
8.46
6.43
4.27
3.34
2.13
2.74
18.1
56.4
38.2
19.3
8.63
6.09
1975
6.59
6.86
5.23
3.53
2.71
31.7
72.6
76.7
53
23.4
14.7
7.86
1976
5.27
4.52
3.22
3.45
3.05
2.58
11.7
29.7
29
12
7.07
4.89
1977
4.32
3.88
2.91
3.26
3.76
10.4
35.2
44.1
32.7
16.7
9.08
6.88
1978
6.56
6.23
6.46
4.70
4.50
21.1
57
77.9
40.7
18.7
8.30
5.88
1979
4.70
5.61
3.47
3.46
16.7
4.66
45.2
62.2
19.3
8.31
5.35
4.76
1980
4.13
2.85
2.90
2.04
6.57
8.48
46.1
84.7
50.3
16.8
7.47
4.92
1981
4.37
4
3.44
2.74
2.73.
4.13
37
45.4
82.5
29.8
12.5
6.16
1982
5.22
5.02
5.94
3.87
4.15
4.19
12.7
44.8
72.5
11.6
6.12
4.12
1983
3.61
3.16
2.11
2.06
2.95
1.46
5.98
16.9
59.2
65.3
10.5
5.08
1984
5.43
2.92
1.94
1.86
1.47
5.32
66
25
81.8
14.3
6.69
4.22
1985
3.55
2.43
2.19
2.31
2.02
2.82
22.3
41.5
42.2
19.9
7.68
6.89
1986
4.89
4.18
3.04
3.39
3.25
2.86
29.1
36.6
32.7
25.5
8.68
5.86
1987
4.84
4.32
3.41
3.54
4.48
2.91
27.3
43.6
27.7
11.4
6.43
4.83
1988
4.15
3.36
3.48
3.56
3.17
6.11
34.7
87.3
18.1
6
2.96
2.39
1989
4.96
2.06
1.34
1.05
0.934
1.22
11.5
35.4
22
14.9
6.33
4.74
1990
3.73
5.40
5.33
3.61
4.46
3.89
48.2
44.7
23.3
10.5
6.01
4.61
1991
5.33
3.49
3.70
3.19
2.50
2.68
6.12
27.4
21.2
6.28
4.44
4.01
1992
3.80
3.37
2.19
2.18
2.20
3.11
3.73
15.6
20.7
7.83
4.02
2.39
1993
2.28
1.87
2.09
1.91
2.26
4.76
12.9
25.3
24.9
7.56
3.81
2.98
1994
2.97
3.03
2.03
2.05
1.95
5.80
7.49
24.2
15.7
4.89
3.04
2.26
1995
2.41
2.16
1.71
1.61
1.36
2.47
5.92
46
22.6
5.04
6.84
3.80
1996
3.57
3.62
2.79
2.32
1.67
3.64
47
40.3
34.6
26.8
7.31
3.94
1997
3.22
2.80
1.72
2.57
1.45
1.74
20.2
44.2
28.5
9.95
6.96
8.94
1998
4.78
3.73
4.06
3.90
2.31
1.86
23
37.9
32.2
14.6
7.18
4.11
1999
3.28
2.53
1.84
1.80
2.18
18.1
44.2
46.6
47.3
22.5
5.69
3.57
2000
2.40
3.32
1.52
1.40
1.38
17.5
42
59.8
76.2
16.5
6.34
4.36
2001
2.84
1.90
1.82
2.13
2.18
6.42
23.8
39.8
27.7
11.4
5.22
3.69
2002
3.88
4.95
3.27
2.62
3.92
4.84
7.89
34.3
17.3
9.40
4.78
3.11
2003
3.72
4.16
2.46
1.99
1.77
3.16
25.2
34.2
42.7
14.8
5.86
3.67
2004
3.55
2.60
1.80
2.53
2.35
1.27
27.2
21.3
12.5
9.46
4.59
3.13
2005
3.76
3.75
2.46
2.06
1.65
1.26
20.7
28.1
20.8
18.7
5.79
3.59
2006
2.98
2.53
2.79
2.13
1.85
1.79
14.4
26.1
22.9
7.34
4.35
3.82
