1987

1.5

1993

6.9

2001

5.0

1989

8.2

2001

6.0

1981

7.4

1980

5.8

1998

5.3

1988

7.7

2003

5.0

1996

7.5

1994

8.0

2005

6.3

2008

9.0

1982

0.0

2001

3.9

1984

3.0

1982

0.0

2002

5.4

2011

5.7

1977

7.6

2000

6.0

1987

5.7

1992

8.0

1995

7.4

2003

5.7

1997

1.0

1992

5.0

1989

0.0

1994

6.5

2007

0.0

2014

0.0