170
1966
530
0.24
1967
110
0.30
1968
140
0.56
1969
446
0.47
1970
225
0.64
1971
216
0.96
1972
190
0.48
1973
298
0.46
1974
90.0
0.57
1975
156
0.78
1976
78.6
0.78
1977
98.0
0.29
1978
190
0.71
1979
94.0
0.46
1980
290
0.29
1981
90.0
0.33
1982
210
0.96
1983
288
0.96
1984
88.0
0.63
1985
112
0.46
1986
112
0.46
1987
56.1
0.43




































