Year	Percent
2003-01-01	2.12765957446808
2004-01-01	1.96078431372549
2005-01-01	1.72413793103448
2006-01-01	1.42857142857143
2007-01-01	2.08218675472390
2008-01-01	2.70976027397260
2009-01-01	4.43997660979637
2010-01-01	2.10769833614661
2011-01-01	2.64230578468621
2012-01-01	2.54155531289367
2013-01-01	5.20068745750194
2014-01-01	3.69060451210736
2015-01-01	3.86324611656826
2016-01-01	4.28016980561228
2017-01-01	3.86620420033464