Year	Percent
1995	4.005
1996	4.601
1997	4.427
1998	6.33
1999	6.519
2000	7.146
2001	10.32
2002	12.7
2003	19.24
2004	19.46
2005	18.39
2006	25.32
2007	23.39
2008	16.94
2009	11.96
2010	14.37