-3,966
-8 000
-6 000
-4 000
-2 000
-70
1977
-1,219.9
1978
-133.4
1979
163.4
1980
-102.5
1981
-161.3
1982
-1,348.4
1983
-252.3
1984
-1,203
1985
-2,378.8
1986
-1,567.3
1987
-2,601.4
1988
-708.1
1989
-1,007.7
1990
-2,849.7
1991
-2,729.9
1992
-6,015
1993
-1,947.2
1994
1,546.1
1995
-1,199.5
1996
-787.6
1997
-34.2
1998
755
1999
508
2000
1,518
2001
1,659
2002
946
2003
255
2004
-1,876
2005
-1,855
2006
-4,572
2007
-5,636
2008
-7,233
2009
-8,932
2010
-6,017
2011
-5,048
2012
-3,966
2013
