Year	Percent
1995	3.427
1996	3.449
1997	3.33
1998	3.684
1999	3.609
2000	3.709
2001	3.743
2002	3.818
2003	3.805
2004	4.104
2005	3.948
2006	4.038
2007	3.728
2008	3.406
2009	3.196
2010	2.945