1984

7.6

1996

3.6

1975

7.2

1993

4.9

1979

6.7

1984

5.9

1985

3.9

1984

7.5

1989

8.3

1991

6.1

1988

5.5

1980

5.7

1979

0.0

1986

5.0

1974

7.5

1977

7.7