Year	Percent
1996-01-01	46.6140
1997-01-01	37.0957
1998-01-01	24.3243
1999-01-01	21.4815
2000-01-01	14.6226
2001-01-01	24.0642
2002-01-01	52.7197
2003-01-01	41.2338
2004-01-01	32.3864
2005-01-01	39.3232
2006-01-01	34.7187
2007-01-01	27.9135
2008-01-01	30.8235
2009-01-01	40.2491
2010-01-01	43.0700
2011-01-01	38.5656
2012-01-01	26.7346
2013-01-01	24.2441
2014-01-01	28.7995
2015-01-01	28.6464
2016-01-01	34.0313