Year	Percent
2000	14.00802
2001	17.59224
2002	20.76319
2003	17.25501
2004	14.85844
2005	13.1819
2006	11.26349
2007	10.76327
2008	8.7014
2009	8.70846
2010	9.73498
2011	8.55958
2012	7.9527
2013	7.56645
2014	7.17592
2015	6.68763
2016	8.91035
2017	8.66987