Year	Percent
1995	4.11
1996	4.403
1997	4.406
1998	4.29
1999	4.729
2000	4.151
2001	4.622
2002	5.512
2003	6.574
2004	6.609
2005	6.555
2006	6.707
2007	6.954
2008	7.003
2009	8.798
2010	8.059