Year	Percent
2000	14.5845
2001	18.4176
2002	16.8489
2003	13.0448
2004	11.3017
2005	9.1103
2006	7.7309
2007	5.6974
2008	4.6557
2009	6.0127
2010	9.8429
2011	11.5142
2012	12.3963
2013	12.571
2014	11.3839
2015	9.0671
2016	7.588
2017	5.9013