Year	Percent
2000	14.6565
2001	16.7599
2002	15.9687
2003	12.2917
2004	10.7207
2005	8.9633
2006	8.3426
2007	6.4633
2008	5.1816
2009	5.9655
2010	8.8239
2011	9.3717
2012	9.9753
2013	10.9312
2014	9.5476
2015	7.7609
2016	6.5794
2017	5.7991