Year	Percent
2005-01-01	1.91352619081383
2006-01-01	1.80600997855120
2007-01-01	1.92208372607893
2008-01-01	2.11604758221286
2009-01-01	2.97363843240927
2010-01-01	3.08948863359851
2011-01-01	2.85480760513634
2012-01-01	2.81036498531380
2013-01-01	2.69301522518658
2014-01-01	2.62171716056812
2015-01-01	2.41911264249020
2016-01-01	2.06307068464237
2017-01-01	1.90953723867363