439.7
1987
2110
42.6
1988
2110
42.6
1989
1110
46.7
1990
1110
36.0
1991
1070
36.0
1992
1170
36.0
1993
1150
30.6
1994
1070
33.8
1995
1140
33.2
1996
1320
37.6
1997
878
36.4
1998
1620
41.5
1999
2000
37.1
2000
2520
50.4
2001
1570
34.2
2002
2070
44.6
2003
2380
37.2
2004
964
30.4
2005
1480
34.9
2006
904
46.0










































