1975

6.9

1972

3.6

1973

6.3

1979

7.0

1977

6.8

1976

4.2

1977

6.0

1978

0.0

1977

6.5

1981

7.0

1978

7.4

1971

6.6

1979

4.0

1976

0.0

1980

0.0

1973

6.3

1983

5.9

1978

6.1

1972

5.6

1974

0.0

1969

7.1

1985

6.9

1977

6.9

1976

6.5

1980

7.1

1973

0.0

1973

5.5

1978

0.0

1990

5.8

1979

0.0

1977

1.0

1982

6.3

1985

7.0

1977

4.7

1983

6.3

1982

6.0

1985

6.5

1972

6.0

1982

6.7

1973

6.0

1977

5.1

1972

5.7

1971

5.8

1973

5.5

1977

5.9

1972

5.4

1972

6.8

1980

5.3

1970

6.3

1980

6.3

1977

3.7

1971

6.0

1973

6.7

1979

6.3

1976

6.7

1984

4.8

1979

5.0

1977

6.6

1975

6.7

1979

4.1

1972

6.7

1976

6.4

1973

0.0

1980

6.3

1983

6.9