Year	Percent
2000	4.2745
2001	7.9835
2002	5.0406
2003	1.9504
2004	3.8949
2005	4.1265
2006	3.0969
2007	3.1523
2008	3.9345
2009	4.2031
2010	4.1137
2011	4.5163
2012	7.626
2013	9.4419
2014	13.1069
2015	12.7844
2016	8.5821
2017	5.6174