1980

5.0

1972

6.8

1983

7.2

1982

6.4

1971

5.8

1971

6.0

1970

6.7

1971

6.7

1980

0.0

1973

6.3

1974

7.3

1974

6.5

1975

6.9

1972

6.7

1980

7.0

1976

6.3

1978

7.4

1970

6.2

1971

6.9

1973

6.4

1979

5.0

1977

6.7

1978

6.4

1974

5.1

1976

6.2

1979

6.5

1980

5.1

1972

5.7

1979

6.4

1979

6.4

1971

6.8

1976

6.8

1977

7.0

1974

6.5

1977

6.3

1974

6.4

1977

6.0

1978

6.5

1978

7.1

1979

5.8

1980

5.6

1972

5.8

1975

5.5

1979

0.0