Year	Percent
2000	16.5663
2001	20.8641
2002	18.7763
2003	14.2029
2004	12.4001
2005	10.2974
2006	8.6437
2007	6.5158
2008	5.4793
2009	6.9848
2010	10.8592
2011	12.2629
2012	13.5221
2013	13.9015
2014	12.3122
2015	9.7772
2016	8.0995
2017	6.354