1992

6.3

1982

6.1

1970

5.3

1997

6.4

1975

6.8

2005

5.1

1981

3.2

2008

6.1

2009

4.2

1987

6.1

2017

8.5

2023

0.0

2005

5.5

2007

4.5

2008

5.0

1965

6.0

1977

6.8

1976

5.6

2004

6.6

2023

10.0