1987

1.5

1993

6.7

2001

5.0

1989

8.0

2001

6.0

1981

7.5

1980

5.8

2003

4.3

2005

6.3

2008

9.0

1982

0.0

1984

3.0

2002

5.4

2011

5.7

1977

7.6

2000

6.0

1987

5.7

1995

7.3

2003

6.3

1997

1.0

1992

5.0

1998

4.5

1994

9.0

1989

0.0

1994

6.0

1982

0.0

2014

0.0

1992

8.0