Year	Percent
1993	2.04651
1994	34.88619
1995	25.80456
1996	23.91627
1997	16.39094
1998	18.54051
1999	11.91809
2000	10.03407
2001	5.2682
2002	5.67599
2003	8.3853
2004	5.40457
2005	5.68413
2006	3.72373
2007	9.69873
2008	9.97087
2009	9.34265
2010	9.16149
2011	7.83119