2007 7.5

2007 7.8

2007 7.4

2007 5.5

2007 6.5

2007 7.1

2007 7.4

2006 6.5

2006 5.7

2005 5.6

2005 6.1

2005 7.5

2005 7.8

2004 5.8

2004 7.9

2004 4.7

2004 4.0

2004 7.7

2004 7.2

2003 5.4