Year	Percent
1993	6.46434
1994	3.60822
1995	0.97085
1996	0.44141
1997	0.64916
1998	4.19336
1999	2.34657
2000	4.88457
2001	3.47529
2002	9.74498
2003	4.30827
2004	6.56071
2005	5.17307
2006	7.15897
2007	4.35168
2008	0.87325
2009	5.34932
2010	4.81325
2011	5.28749
2012	0.24035
2013	0.36756
2014	0.38591
2015	0.48847