Year	Percent
1996-01-01	38.7960
1997-01-01	40.8749
1998-01-01	45.2408
1999-01-01	57.0182
2000-01-01	45.0153
2001-01-01	43.6083
2002-01-01	46.8416
2003-01-01	47.1694
2004-01-01	54.9398
2005-01-01	60.5491
2006-01-01	69.5896
2007-01-01	70.6895
2008-01-01	64.3256
2009-01-01	64.9396
2010-01-01	58.5014
2011-01-01	57.1170
2012-01-01	51.1844
2013-01-01	49.7545
2014-01-01	60.6186
2015-01-01	55.5015
2016-01-01	55.5873