1954

7.1

1952

6.7

1961

6.5

1938

6.8

1955

5.8

1956

7.5

1930

1.0

1930

1.0

1957

7.7

1963

5.9

1940

7.0

1940

6.5

1969

5.0

1964

6.2

1962

6.4

1953

5.8