1935

6.6

1955

5.3

1932

7.0

1992

7.5

1919

6.9

1929

7.5

1975

7.5

1951

5.2

1958

7.7

1984

8.0

1998

7.3

1957

8.5

1966

7.7

1966

7.3

2015

4.5

1989

7.2

1996

6.8

1955

7.5

1949

6.6

1964

6.0