1999

4.5

1988

6.5

1974

6.3

1996

5.5

1992

5.5

1983

6.9

1980

4.7

1974

7.2

1973

4.0

1998

6.5

1985

6.4

1984

7.5

1998

5.9

1988

5.3

1999

6.8

1990

6.2

1979

0.0

1975

2.0

1973

0.0

1996

2.0

1998

8.1

1980

0.0

1994

4.7

1997

4.9

1984

4.5