Year	Percent
2002	6.2053
2003	4.5091
2004	2.4788
2005	4.2401
2006	2.9021
2007	3.0652
2008	3.0624
2009	3.1758
2010	1.6392
2011	1.9285
2012	1.573
2013	1.5344
2014	1.0318
2015	1.9539
2016	1.8924
2017	1.7474