Year	Percent
1995	3.017
1996	2.959
1997	2.897
1998	3.197
1999	2.862
2000	2.41
2001	2.746
2002	2.884
2003	3.809
2004	3.401
2005	3.37
2006	3.257
2007	3.186
2008	3.615
2009	4.132
2010	3.96