470
1964
155
0.72
1965
491
0.90
1966
437
0.70
1967
370
1.00
1968
430
0.64
1969
304
1.10
1970
132
0.60
1971
430
0.58
1972
291
0.73
1973
158
0.85
1974
626
1.24
1975
400
0.73
1976
312
0.90
1977
340
0.98
1978
605
1.02
1979
280
0.82
1980
120
1.05
1981
390
1.16
1982
382
0.65
1983
326
0.62
1984
750
0.62
1985
350
0.50
1986
320
0.50
1987
150
1.10
1988
110
0.76
1989
419
0.50
1990
320
0.90
1991
65.0
0.78
1992
150
1.16
1993
1170
0.70
1994
392
1.32
1995
77.0
0.46
1996
74.7
0.640
1997
219
0.820
