Year	Percent
1995	13.0661
2000	10.8148
2001	10.5938
2002	13.1309
2003	14.4434
2004	15.0251
2005	17.8846
2006	16.2731
2007	14.929
2008	18.7228
2009	21.6468
2010	21.8993
2011	22.7657
2012	27.5626
2013	30.1241
2014	34.7013
2015	35.129
2016	40.1747
2017	42.8666