360
1964
2820
5.95
1965
1820
0.850
1966
2010
2.08
1967
1820
1.23
1968
2910
0.790
1969
2500
3.63
1970
3360
2.21
1971
1820
15.2
1972
2410
3.36
1973
2100
6.65
1974
2890
5.96
1975
4190
3.45
1976
2480
5.76
1977
5240
7.01
1978
3300
5.87
1979
1680
5.03
1980
3850
1.80
1981
7390
12.9
1982
4040
7.56
1983
4370
14.8
1984
7240
1.02
1985
2330
7.98
1986
2440
6.65
1987
2210
9.81
1988
2620
6.41
1989
5910
6.37
1990
1400
10.6
1991
4160
7.25
1992
2580
4.17
1993
2910
7.24
1994
2250
5.64
1995
1360
3.24
1996
2280
2.96
1997
2540
8.78
