1997

1.0

1999

7.3

2003

4.9

2004

6.5

2002

6.3

2006

0.0

2003

8.5

2007

7.4

2020

6.4

2003

0.0

2001

6.9

2000

5.3

2005

5.4

2001

7.0

2007

7.8

2012

7.1