1973

6.3

1982

6.1

1981

6.2

1980

6.6

1977

5.2

1979

7.3

1971

7.0

1973

4.4

1972

6.6

1975

5.5

1977

4.7

1983

7.2

1974

4.8

1973

4.9

1972

6.7

1972

5.9

1983

6.8

1972

6.5

1975

6.9

1980

0.0

1971

6.3

1978

5.3

1975

6.8

1978

0.0

1971

5.7

1974

6.9