2004

4.4

2005

3.5

1989

5.5

2000

5.3

1988

4.3

2001

4.5

1996

4.8

1998

2.6

2001

2.5

2002

4.0

1987

3.5

1998

3.6

2003

0.0

1987

6.5

1988

4.7