Year	Percent
1999	10.29867
2000	9.58472
2002	10.73678
2003	11.62872
2004	12.62543
2006	12.94913
2007	12.46018
2008	11.89506
2009	10.61702
2010	12.92962
2011	11.5664
2012	10.74228
2016	9.74102