1963

6.0

1965

4.7

1972

0.0

1977

6.8

1968

6.1

1967

3.5

1969

4.4

1965

7.0

1954

7.9

1950

6.9

1957

7.6

1949

7.2

1962

6.6

1959

8.1

1975

2.0

1978

5.9

1954

6.3

1966

5.5

1966

7.6

1964

0.0

1952

6.9