Year	Percent
1993	5.347
1994	3.151
1995	4.433
1996	4.228
1997	2.5495
1998	4.7955
1999	3.8269
2001	2.2153
2002	4.0556
2003	4.524
2005	2.8383
2006	2.0039
2007	1.2225
2008	0.958
2009	0.4828
2010	0.8456
2011	0.8575
2012	2.407
2013	1.1139
2014	1.1087
2015	1.0517
2016	0.5753
2017	0.6094