1975

0.0

1975

3.7

1985

6.7

1977

6.2

1982

4.1

1972

5.4

1978

4.8

1972

5.9

1984

6.4

1985

5.6

1971

7.3

1997

7.0

1979

6.8

1974

0.0

1999

6.7

1975

7.1

1979

6.2

1978

0.0

1984

7.3

1984

5.0

1972

5.6

1972

0.0

1975

7.7

1973

6.6

1981

5.3