Year	Percent
2002	23.38548
2003	22.37352
2004	25.93558
2005	26.53037
2006	27.86972
2007	26.60901
2008	26.70104
2009	21.7764
2010	21.04464
2011	22.58156
2012	20.99521
2013	20.40632
2014	21.12376
2015	22.03047
2016	21.704