1976

6.9

1986

4.9

1985

5.1

1975

7.2

1989

5.9

1995

5.4

1990

7.4

1976

6.8

2005

8.3

1994

7.8

2000

7.0

1981

5.6

1987

5.0

1978

7.4

2016

7.0

1985

6.5

1951

8.8

1977

0.0

1981

7.6

2004

8.6

1983

3.9

1989

6.6

1983

4.3

1998

7.5

2003

6.2

1999

5.6

1983

6.4

1996

0.0

2016

7.9

1966

4.0

2017

8.3

1981

6.3

2012

3.7

2019

6.3

2022

5.8

1986

5.7

1994

3.0