630
1964
1220
35.0
1965
1960
39.0
1966
4370
42.2
1967
3100
41.4
1968
1710
45.4
1969
1940
38.4
1970
1940
36.8
1971
2880
44.8
1972
2730
49.0
1973
3010
45.4
1974
4050
37.4
1975
1780
45.4
1976
1590
38.3
1977
2000
30.4
1978
2690
41.0
1979
2260
34.1
1980
1720
28.7
1981
1950
27.8
1982
1590
82.0
1983
1390
62.4
1984
1550
35.6
1985
1660
28.8
1986
1120
33.8
1987
2120
29.0
1988
3940
74.6
1989
1570
60.0
1990
1410
49.4
1991
1620
41.4
1992
1210
31.5
1993
2370
32.9
1994
1130
29.4
1995
1420
32.2
1996
1960
43.3
1997
2270
36.3
