Year	Percent
2005-01-01	2.32438270498969
2006-01-01	2.13453483751847
2007-01-01	2.36786230376248
2008-01-01	2.62786087021497
2009-01-01	3.62217837832320
2010-01-01	3.81908272866921
2011-01-01	3.54231920888115
2012-01-01	3.29794599172158
2013-01-01	3.34848949897066
2014-01-01	3.24953084444551
2015-01-01	2.95081055849078
2016-01-01	2.52305628495558
2017-01-01	2.29008826042839