Year	Percent
1995	3.834
1996	3.697
1997	4.085
1998	4.512
1999	4.592
2000	4.595
2001	5.089
2002	5.102
2003	4.858
2004	4.928
2005	5.669
2006	5.522
2007	5.492
2008	5.798
2009	5.654
2010	5.604