1950

5.2

1955

5.7

1965

6.2

1952

6.7

1942

3.2

1966

7.0

1957

7.4

1944

7.3

1958

6.3

1963

5.3

1954

5.2

1952

7.1

1952

7.9

1960

6.1

1961

7.3

1964

6.0

1964

7.3

1964

6.6

1957

5.0

1965

7.0

1943

5.8

1959

6.1

1950

7.1

1949

6.7

1943

6.5

1947

6.3

1948

5.7

1961

5.7