1963

4.0

1974

6.8

1959

5.4

1970

7.4

1970

7.7

1973

7.0

1971

3.3

1967

1.0

1963

5.0

1965

6.2

1964

0.0

1985

4.7

1993

7.0

1979

6.5

1976

6.5

1976

8.0

1972

3.0