2001

4.5

1998

4.8

1996

6.4

2004

2.0

1999

6.3

2000

7.0

2009

0.0

1995

5.1

2014

7.6

2006

4.9

2004

5.3

2011

6.4

1998

4.0

2009

7.5

2012

5.7

2005

7.2

2009

7.6

1998

6.9