Year	Percent
1995	13.42277
1996	8.5536
1997	9.47929
1998	13.70163
2002	16.16084
2003	16.79084
2004	17.64536
2011	18.02201
2012	17.48323
2013	16.50328
2014	18.30194
2015	18.51579
2016	17.55718