1943

7.5

1955

6.0

1997

6.9

1979

6.6

1962

7.6

1972

7.9

1971

7.2

1961

7.7

1986

7.6

1988

6.2

2013

6.1

1975

6.4

1962

7.8

2004

7.0

1939

7.2

1940

7.1

1939

7.6

1924

6.5

1977

6.3

2017

6.0