1961

5.8

1959

7.1

1931

6.9

1986

6.5

2008

7.4

1972

6.4

1999

5.3

1948

5.6

2001

5.1

1930

5.0

1937

6.5

1930

4.9

1932

6.6

1945

6.1

1936

6.8

1955

4.6

1958

6.2

1995

6.3

1993

6.4

1942

6.7