Year	Percent
1993	15.96133
1994	14.62093
1995	4.67065
1996	4.34819
1997	4.91577
1998	2.1807
1999	1.51231
2000	1.49813
2001	1.77018
2002	2.64149
2003	2.77079
2004	4.20866
2005	3.92033
2006	8.26021
2007	8.00751
2008	5.36367
2009	5.72464
2010	4.65569
2011	5.53142
2012	4.93562
2013	4.87551