1954

7.1

1952

6.6

1961

6.3

1938

6.8

1955

6.0

1956

7.5

1930

1.0

1930

1.0

1957

7.7

1963

5.7

1940

6.8

1940

6.5

1969

5.0

1964

6.2

1962

6.4

1953

5.9