Year	Percent
1995	4.628
1996	4.352
1997	4.683
1998	4.842
1999	4.387
2000	4.167
2001	3.476
2002	3.619
2003	3.699
2004	3.955
2005	4.071
2006	3.942
2007	3.42
2008	3.869
2009	4.478
2010	4.288