Year	Percent
1995	3.671
1996	3.613
1997	3.767
1998	4.123
1999	4.786
2000	5.529
2001	6.38
2002	6.192
2003	6.341
2004	6.359
2005	6.363
2006	7.346
2007	7.201
2008	6.944
2009	7.059
2010	6.853