Year	Percent
1995	2.636
1996	2.459
1997	2.487
1998	3.055
1999	2.905
2000	2.574
2001	2.484
2002	2.718
2003	2.646
2004	2.462
2005	2.32
2006	2.328
2007	2.522
2008	3.01
2009	4.374
2010	3.66