Year	Percent
1995	13.63
2001	11.6447
2002	11.6772
2003	9.4542
2004	13.3759
2005	16.3382
2006	15.5108
2007	14.3744
2008	12.5926
2009	12.2704
2010	12.9157
2011	11.7137
2012	11.7151
2013	11.1497
2014	10.826
2015	10.6827
2016	10.4061
2017	10.0386