1974

6.4

1980

3.3

2017

5.7

2010

5.0

2022

5.1

2010

6.6

1949

7.5

1979

6.7

1989

2.7

1987

6.0

2008

5.0

2001

6.5

1982

5.9

2004

6.5

2007

6.1

1978

7.0

1985

7.8

2003

7.3

2001

5.6

1963

6.6