Year	Percent
1999-01-01	2.8950900000000000
2000-01-01	2.0987500000000000
2001-01-01	2.1077800000000000
2002-01-01	2.9577100000000000
2003-01-01	3.2408900000000003
2004-01-01	6.4593900000000000
2005-01-01	6.4851900000000000
2006-01-01	7.5921300000000000
2007-01-01	8.5892000000000000
2008-01-01	7.1996500000000000
2009-01-01	11.7199000000000000
2010-01-01	14.9483000000000000
2011-01-01	13.5044000000000000
2012-01-01	17.6300000000000000
2013-01-01	19.7930000000000000
2014-01-01	17.5686000000000000
2015-01-01	23.0407000000000000
2016-01-01	23.8831000000000000