1968

7.1

1978

0.0

1983

3.9

1967

6.9

1972

7.9

1988

4.4

1983

7.6

1982

2.0

1977

5.0

1977

0.0

1990

8.0

1961

5.1

1975

5.0

1979

5.5

1972

6.5

1978

7.0