Year	Percent
1995	2.95704
2000	1.57672
2001	5.80655
2002	8.91235
2003	6.50197
2004	6.33592
2005	5.32921
2006	5.02013
2007	4.26539
2008	6.31112
2009	5.54172
2010	5.26605
2011	3.37357
2012	3.50702
2013	3.5502
2014	5.04366
2015	3.86963
2016	3.27926
2017	3.96819