1975

6.9

1973

6.3

1977

6.8

1977

6.0

1979

6.2

1979

7.3

1977

6.5

1975

6.7

1981

7.2

1978

7.4

1983

5.7

1973

6.3

1972

6.7

1978

6.1

1977

5.5

1973

5.2

1981

5.7

1992

0.0

1987

6.0

1974

6.5

1977

6.9

1974

3.5

1982

6.3

1978

5.7

1985

6.6

1973

5.6

1973

0.0

1974

0.0

1983

7.3

1978

6.0

1978

6.4

1978

6.1

1971

5.8

1973

6.5

1977

5.9

1972

5.4

1972

6.8

1980

5.3

1983

6.8

1970

6.3

1972

6.2

1977

5.7

1977

6.1

1974

5.9

1976

6.7

1982

7.3

1972

6.1

1977

6.5

1975

6.7

1978

6.5

1973

3.0

1972

6.7

1981

6.4

1974

5.0