Year	Percent
1995	3.581
1996	3.385
1997	3.648
1998	3.397
1999	3.294
2000	3.376
2001	3.531
2002	3.423
2003	3.749
2004	3.443
2005	4.018
2006	6.528
2007	5.695
2008	5.46
2009	5.523
2010	6.011