640
1964
35.0
0.43
1965
29.0
0.27
1966
110
0.34
1967
37.0
0.25
1968
79.0
0.51
1969
39.5
0.51
1970
36.0
0.08
1971
42.2
0.33
1972
17.8
0.56
1973
48.2
0.78
1974
47.6
0.56
1975
151
0.61
1976
19.0
0.87
1977
17.0
0.96
1978
66.4
0.65
1979
81.0
0.28
1980
17.5
0.42
1981
19.0
1.49
1982
17.0
0.61
1983
14.0
0.40
1984
22.0
0.24
1985
31.0
0.98
1986
16.0
0.31
1987
29.4
0.35






























