Year	Percent
1999	8.29453
2000	9.55977
2001	7.70729
2002	8.46158
2003	9.54983
2004	10.61073
2005	12.96255
2006	12.75474
2008	10.89447
2010	14.72699
2011	16.6577
2014	19.25638