2001

6.5

2002

2.2

2000

7.7

2004

5.6

2003

7.8

2007

6.3

2007

5.6

1997

6.7

2005

8.1

2013

7.4

1992

5.7

2005

5.5

1999

4.3

2003

8.0

2006

7.2

1999

8.3

2008

6.1