1992

5.1

1994

4.3

1996

3.5

1977

6.8

1997

5.0

1995

5.5

1983

0.0

1991

4.0

1987

7.7

1993

4.5

1982

0.0

1997

2.7

1988

4.3

2003

6.8

1995

0.0

1983

3.9