Year	Percent
2000	4.71938
2001	5.87925
2002	5.49078
2003	4.15897
2004	3.50718
2005	2.83397
2006	2.7106
2007	2.32359
2008	1.68438
2009	1.78444
2010	2.72237
2011	3.0143
2012	3.195
2013	3.61786
2014	3.32156
2015	2.67975
2016	2.13206
2017	1.80531