1968

6.9

1978

0.0

1983

3.7

1967

6.8

1972

7.9

1988

4.4

1983

7.6

1982

1.7

1977

5.0

1977

0.0

1990

7.3

1962

6.2

1961

5.4

1975

5.0

1979

5.9

1972

6.2

1978

7.0