Year	Percent
1995	14.1131
2000	13.7438
2001	27.0602
2002	33.4578
2003	26.8372
2004	28.1311
2005	23.7719
2006	24.424
2007	22.3259
2008	27.1649
2009	24.132
2010	23.0853
2011	19.183
2012	20.5327
2013	20.5661
2014	23.899
2015	22.4028
2016	22.2181
2017	22.2689