1950

8.1

1993

7.4

1955

7.5

2001

7.5

1995

7.3

1943

7.7

1975

7.5

1932

6.9

1919

6.9

2014

7.1

1939

6.3

2006

7.5

1998

6.7

1968

7.0

1991

6.1

2008

6.1

2005

6.0

1946

6.5

1977

7.3

1968

7.0