1979

6.3

2015

6.1

1994

6.8

2017

5.8

2011

6.4

1956

7.6

1963

7.5

2008

6.8

2011

4.8

2008

5.5

1992

5.7

2008

7.5

2022

6.8

1985

5.3

1981

6.7

1986

6.9

2002

5.1

1999

4.4

1948

7.0

1951

7.5