Year	Percent
2000	13.1305
2001	20.3232
2002	16.4972
2003	15.6013
2004	18.8104
2005	16.214
2006	16.4084
2007	14.9816
2008	13.1038
2009	16.1871
2010	14.4394
2011	13.7331
2012	13.525
2013	15.1519
2014	13.6858
2015	13.858
2016	11.1598
2017	12.2478