Year	Percent
1995	4.043
1996	3.899
1997	3.865
1998	3.432
1999	3.242
2000	2.887
2001	2.304
2002	2.864
2003	3.055
2004	3.379
2005	3.663
2006	3.963
2007	4.271
2008	4.53
2009	3.167
2010	4.511