447
1977
935
41.0
1978
924
38.0
1979
935
39.0
1980
941
32.6
1981
895
37.0
1982
851
42.0
1983
740
36.0
1984
955
35.0
1985
2100
47.4
1986
884
45.5
1987
1090
38.0
1988
953
45.6
1989
724
41.8
1990
1540
34.0
1991
1160
46.6
1992
1540
40.7
1993
1980
37.3
1994
1180
37.3
1995
1820
33.0
1996
2040
43.8
1997
1060
40.2
1998
1490
37.2
1999
1440
34.5
2000
1640
36.0
2001
1430
32.0
2002
1520
39.6
2003
1490
36.6
2004
1150
36.0
2005
1380
55.2
2006
1260
31.2












