Year	Percent
1993	5.355
1994	3.195
1995	3.835
1996	4.157
1997	3.395
1998	9.6042
1999	7.2334
2000	5.3161
2001	6.3738
2002	3.0487
2003	3.4609
2004	3.3283
2005	3.353
2006	2.99
2007	0.9764
2008	0.606
2009	0.8028
2010	2.0305
2011	2.1349
2012	3.3717
2013	1.9766
2014	1.4507
2015	0.9757
2016	1.0088
2017	1.0602