1981

6.5

2020

7.2

1950

7.3

1945

6.3

1939

6.7

1959

8.1

1953

6.9

1924

7.8

1975

6.3

1955

7.0

1950

7.6

1953

5.4

2017

6.6

1985

8.1

1995

5.1

2000

6.7

2013

5.5

1946

6.7

2001

5.0

2011

7.3