Year	Percent
1995	4.174
1996	3.788
1997	4.06
1998	4.063
1999	3.869
2000	3.489
2001	3.838
2002	3.873
2003	3.744
2004	3.378
2005	3.064
2006	3.129
2007	3.534
2008	3.733
2009	4.576
2010	4.172