2004

5.6

1987

7.3

1988

4.9

2004

7.2

2006

7.0

2004

4.6

2003

5.9

2005

5.8

1996

0.0

2006

5.4

2004

4.8

1994

5.7

1993

5.0

1974

3.6

1988

5.6

1995

6.8

2001

6.1

1976

3.0

2007

5.5

2002

5.6