1973

6.3

1983

4.0

1976

4.1

1977

6.5

1978

7.4

1978

6.6

1973

6.3

1974

6.5

1983

5.0

1981

5.4

1976

6.0

1973

5.6

1974

6.3

1978

7.3

1974

0.0

1977

5.9

1972

6.7

1979

6.6

1983

6.8

1972

6.2

1973

6.7

1979

6.3

1977

6.6

1974

5.9

1973

3.5

1982

7.3

1976

5.3

1973

6.4

1977

5.7

1973

3.0

1976

6.4

1975

6.2

1974

4.0

1980

4.0