Year	Percent
1999-01-01	4.05671
2000-01-01	6.51104
2001-01-01	6.07487
2002-01-01	11.54340
2003-01-01	14.06220
2004-01-01	14.63250
2005-01-01	15.93720
2006-01-01	22.19540
2007-01-01	24.38440
2008-01-01	31.63020
2009-01-01	44.40270
2010-01-01	43.70000
2011-01-01	33.40350
2012-01-01	26.48460
2013-01-01	25.52630
2014-01-01	25.69040
2015-01-01	28.93730
2016-01-01	41.33980