1987

7.0

2020

3.9

1971

8.1

2004

7.9

1981

7.0

1981

5.6

1984

7.5

1983

5.1

1985

0.0

1992

6.5

1998

5.3

1990

1.0

1985

7.5

2003

7.6

1997

3.0

2009

5.9

1989

8.3

2013

7.8

1993

5.5

1992

4.4

2015

6.0

1998

7.1

2004

3.0

1985

6.5

1999

8.2

1984

8.2

1983

4.5