Year	Percent
1998	7.84347
2000	7.37182
2002	9.5366
2003	8.86296
2005	9.14141
2006	7.65712
2007	9.34928
2008	9.34653
2009	12.60427
2010	11.20851
2012	10.01239
2013	10.17558
2014	10.6099
2015	11.62143
2016	13.21387