Year	Percent
1996	8.3
1997	8.1
1998	6.5
1999	8.7
2000	11.07301
2001	10.30851
2002	9.58403
2003	9.56825
2004	9.61836
2005	9.95112
2006	9.01055
2007	8.36663
2008	9.13111
2009	8.4609
2010	7.51814
2011	6.6051
2012	5.75122