Year	Percent
1996-01-01	54.4703
1997-01-01	51.8689
1998-01-01	57.2879
1999-01-01	59.7485
2000-01-01	63.0029
2001-01-01	63.5826
2002-01-01	62.6376
2003-01-01	61.5642
2004-01-01	56.7775
2005-01-01	51.2990
2006-01-01	49.2439
2007-01-01	51.5877
2008-01-01	48.0096
2009-01-01	44.0922
2010-01-01	42.5419
2011-01-01	40.2103
2012-01-01	37.7892
2013-01-01	35.5965
2014-01-01	33.4808
2015-01-01	40.4109
2016-01-01	37.3785