1931

7.2

1962

7.6

1936

6.4

1952

8.3

1959

7.2

1998

7.3

1966

6.8

1959

6.3

1971

4.8

1932

7.8

1954

7.9

1995

8.1

1963

8.1

1993

8.6

1960

8.1

1957

8.2

1966

8.2

1953

7.9

1951

7.4

1931

8.1