1935

7.5

1910

6.1

1931

7.5

1948

7.1

1942

5.8

1969

6.3

1943

6.2

1939

6.7

1957

6.8

1944

6.0

1967

6.4

1974

6.2

1996

5.2

1971

5.4

1964

6.1

1971

4.5

1958

6.6

1970

5.8

1974

4.1

1965

6.7