1980

0.0

1980

8.5

1978

6.0

1968

6.8

1979

8.0

1967

6.2

1972

6.0

1971

7.3

1982

6.0

1985

7.8

1975

6.9

1978

7.6

1970

6.3

1969

7.7

1981

5.7

1971

7.7

1968

3.0