Year	Percent
2000-01-01	4.60364880091424
2001-01-01	4.17452135000121
2002-01-01	3.41535105089421
2003-01-01	3.72562094851292
2004-01-01	3.82654235604157
2005-01-01	3.91710355449774
2006-01-01	3.65031272355073
2007-01-01	3.41602468720901
2008-01-01	3.32098446488419
2009-01-01	3.80784506829241
2010-01-01	3.79525777764262
2011-01-01	3.48191779680640
2012-01-01	3.28739795413695
2013-01-01	3.22117528519328
2014-01-01	3.61330618913416
2015-01-01	3.69274160116641
2016-01-01	3.79797931885181
2017-01-01	3.76453465454166