Year	Percent
2000-01-01	4.53796549778205
2001-01-01	4.14931073949987
2002-01-01	3.43448593942310
2003-01-01	3.43802397353031
2004-01-01	3.56141052598677
2005-01-01	3.71606344411243
2006-01-01	3.64498720355621
2007-01-01	3.56426232794339
2008-01-01	3.47244901137464
2009-01-01	4.09070070360209
2010-01-01	3.82153073408746
2011-01-01	3.36489727490851
2012-01-01	3.17437852116596
2013-01-01	3.15955729150900
2014-01-01	3.28484654532391
2015-01-01	3.28617796435941
2016-01-01	3.52859748680425
2017-01-01	3.64709027790047