1974

6.1

1986

5.6

1988

7.4

1992

4.1

1975

7.3

1976

10.0

1989

5.9

1990

6.4

1987

5.6

1982

7.5

1994

5.0

1977

7.2

1976

0.0

1987

7.7

1988

0.0

1986

4.9

1979

4.2

1973

4.8

1978

6.2

1975

7.2

1994

5.1

1983

7.5

1972

7.4

1984

5.0

1977

7.2

1977

6.3

1980

5.0

1988

6.5

1974

7.5

1981

7.2

1978

0.0