1975

3.8

1943

7.7

1948

7.5

1964

5.3

1952

5.6

1968

5.3

1975

5.2

1949

5.5

1940

5.0

1966

6.2

1952

6.5

1975

4.0

1948

5.6

1969

6.0

1946

7.6

1956

5.0

1973

5.0

1974

5.5