Year	Percent
1993	3.64
1994	2.3
2002	8.5205
2003	5.5437
2004	5.6827
2005	4.3894
2006	4.2309
2007	4.0135
2008	3.8741
2009	4.1259
2010	3.74
2011	3.5137
2012	3.4198
2013	3.3112
2014	4.8227
2015	3.683
2016	4.843
2017	4.1686