2008

4.5

2006

6.9

1997

8.1

2005

5.9

2001

7.2

1996

7.3

2000

5.4

1993

7.7

2012

8.1

2009

7.9

2005

7.0

1996

7.8

2005

4.5

1999

6.5

2013

5.0

2008

0.0

2005

7.9