1976

7.8

1974

5.4

1951

5.9

1937

4.4

1961

7.7

1982

7.4

1962

6.6

1957

5.7

1964

7.9

1971

7.7

1940

5.0

1981

5.8

1975

4.7

1961

5.0

1976

6.5

1975

5.3

1944

5.0

1967

7.8