Year	Percent
2004	0.3131
2005	0.3966
2006	0.44187
2007	0.29265
2008	4.64412
2009	26.77593
2010	7.87678
2011	6.41123
2012	7.09165
2013	7.98372
2014	7.82828
2015	9.67828
2016	9.12371