420
1964
4030
76.8
1965
5790
80.8
1966
3210
76.4
1967
2210
65.9
1968
8050
67.9
1969
2320
79.5
1970
6520
57.4
1971
2640
65.5
1972
4030
97.4
1973
6820
90.1
1974
5110
90.7
1975
7400
77.0
1976
2720
62.6
1977
6590
81.9
1978
4210
96.0
1979
3920
76.8
1980
8050
64.4
1981
4650
60.5
1982
4650
60.5
1983
3020
61.5
1984
4470
45.5
1985
2750
68.6
1986
5760
77.1
1987
4600
97.9
1988
3860
78.6
1989
6270
47.6
1990
4900
47.6
1991
2870
63.0
1992
3370
75.5
1993
8430
51.0
1994
2920
46.7
1995
6760
61.1
1996
6520
64.6
1997
4120
59.6
