410
1964
1790
44.0
1965
1620
38.8
1966
1990
34.0
1967
1370
28.6
1968
2400
36.4
1969
1550
37.8
1970
2520
39.3
1971
1660
39.3
1972
1690
48.3
1973
2900
37.0
1974
2190
53.2
1975
3280
50.2
1976
1900
40.4
1977
2190
41.1
1978
1710
43.8
1979
1850
39.1
1980
2270
35.9
1981
2320
39.1
1982
1570
39.1
1983
1660
38.5
1984
1880
37.6
1985
1290
38.3
1986
1710
37.6
1987
1760
37.6
1988
1710
52.5
1989
2060
52.5
1990
1710
52.5
1991
1700
58.0
1992
1650
55.1
1993
2970
44.9
1994
1900
50.2
1995
2600
44.0






