610
1965
408
15.4
1966
446
15.0
1967
535
16.4
1968
365
15.2
1969
433
14.0
1970
490
13.7
1971
607
16.0
1972
415
18.8
1973
445
18.8
1974
621
18.0
1975
598
16.0
1976
415
20.0
1977
445
15.3
1978
395
14.6
1979
365
17.6
1980
365
23.4
1981
3010
16.8
1982
385
10.5
1983
365
19.0
1984
365
8.40
1985
565
7.80
1986
565
7.80
1987
920
21.8
1988
1390
20.0
1989
292
18.0
1990
490
18.0
1991
1210
22.0
1992
307
24.4
1993
1190
24.4
1994
339
26.8
1995
608
28.0
1996
802
14.3
1997
332
15.4
1998
856
19.4
