2000

7.5

2003

5.6

1995

7.2

1985

5.4

1996

7.7

1997

3.6

1984

3.5

1992

4.2

1986

4.0

1983

5.1

1999

7.1

2001

7.4

2001

6.9

1996

7.1

1993

8.4