1976

7.6

1957

7.6

1993

7.4

1948

6.7

1949

4.5

1923

5.8

1959

5.7

1914

5.7

1929

5.2

1935

5.5

1952

6.8

2010

6.1

1951

4.6

1956

6.9

1961

6.8

1919

7.1

1949

6.9

1936

7.5

1955

5.0

1950

6.5