1960

7.5

1974

4.7

1971

3.5

1982

6.7

1972

6.2

1970

5.9

1977

4.0

1971

5.6

1965

5.5

1983

4.2

1963

3.5

1979

5.7

1971

7.0

1976

5.3

1969

6.3

1979

5.4

1989

7.0

1959

6.0

1970

4.4

1959

7.0

1963

5.3

1959

6.0

1974

4.7

1989

7.3

1961

5.7

1978

3.3