1973

6.3

1971

6.6

1980

2.0

1987

6.2

1977

5.5

1982

4.0

1969

7.1

1974

1.0

1987

6.5

1983

6.3

1982

6.0

1984

7.5

1974

5.8

1971

5.8

1973

6.5

1977

5.9

1972

6.7

1970

6.3

1980

5.9

1976

4.7

1972

6.2

1976

6.1

1971

6.9

1981

6.7

1984

5.5

1974

6.4

1971

6.8

1973

6.4

1976

6.3

1976

6.4

1974

0.0