Year	Percent
2003-01-01	3.33743210876727
2004-01-01	2.98594884188592
2005-01-01	2.54731208035992
2006-01-01	2.82568463665395
2007-01-01	2.23535174607957
2008-01-01	2.94444801522725
2009-01-01	7.21862065127939
2010-01-01	7.54841100861786
2011-01-01	7.03319576393798
2012-01-01	5.98346829997980
2013-01-01	5.38103506455404
2014-01-01	4.89040397309472
2015-01-01	3.96666366578696
2016-01-01	2.96862921369136
2017-01-01	2.74378753514715