1980

-3,375.8

1981

-3,126.7

1982

-2,731.6

1983

-1,232.9

1984

-754.8

1985

128.2

1986

815.2

1987

-229.4

1988

3,890.4

1989

5,748.9

1990

5,615.4

1991

8,380.8

1992

9,587.0

1993

6,747.4

1994

17,338.8

1995

20,184.0

1996

19,739.7

1997

22,711.0

1998

30,953.3

1999

24,552.5

2000

17,653.2

2001

20,235.9

2002

20,912.4

2003

37,955.2

2004

32,315.4

2005

44,072.2

2006

57317.0

2007

73,060.6

2008

39,076.2

2009

50,768.6

2010

67,430.8