Year	Percent
1995	2.95
1996	2.941
1997	3.092
1998	3.618
1999	3.892
2000	4.3
2001	4.732
2002	4.713
2003	4.91
2004	4.331
2005	4.111
2006	4.183
2007	4.781
2008	4.314
2009	4.433
2010	4.9