Year	Percent
2001	8.71469
2002	10.39245
2003	10.21232
2004	10.33047
2005	10.20985
2006	14.2807
2007	16.11015
2008	13.71916
2009	12.48725
2010	11.98268
2011	12.45402
2012	10.57483
2013	7.82534
2014	7.83843
2015	7.64531