1948

6.8

1947

6.4

1946

5.7

1950

6.3

1954

6.0

1945

5.8

1969

6.2

1952

5.4

1955

6.0

1955

7.5

1953

4.9

1950

6.8

1957

5.6

1951

5.8

1952

7.1

1958

4.6

1957

5.4

1954

6.9

1956

6.8

1956

6.5

1952

6.5