Year	Percent
2000	29.6283
2001	35.4331
2002	31.4831
2003	24.0564
2004	23.7822
2005	21.0357
2006	20.2755
2007	15.9376
2008	11.3675
2009	13.8251
2010	20.0979
2011	23.6233
2012	25.9991
2013	25.6647
2014	23.7414
2015	22.2574
2016	16.914
2017	12.4468