Year	Percent
2000	2.51476
2001	2.03024
2002	2.17709
2003	2.04805
2004	2.83404
2005	2.37142
2006	2.11221
2007	2.00327
2008	1.95744
2009	2.29635
2010	2.48266
2011	2.34833
2012	2.31757
2013	2.43277
2014	2.28234
2015	2.00451
2016	1.47024
2017	1.67797