1996

7.5

1998

6.3

1996

6.3

1983

6.0

1977

6.5

1997

0.0

1981

6.8

1986

7.2

1973

7.0

1977

0.0

2002

6.1

1996

5.3

1975

7.2

1982

5.0

2000

4.8

1980

0.0

1990

5.0

1992

7.0

1982

4.5

1977

5.8