Year	Percent
1994-01-01	53.9567
1995-01-01	54.0084
1996-01-01	54.1232
1997-01-01	53.1585
1998-01-01	54.8045
1999-01-01	55.1954
2000-01-01	53.1839
2001-01-01	52.0254
2002-01-01	52.7334
2003-01-01	46.8403
2004-01-01	39.1126
2005-01-01	33.8259
2006-01-01	31.4501
2007-01-01	20.8553
2008-01-01	21.1666
2009-01-01	23.3664
2010-01-01	17.3455
2011-01-01	17.9112
2012-01-01	13.3823
2013-01-01	14.4657
2014-01-01	13.9646
2015-01-01	16.1171
2016-01-01	13.9708
2017-01-01	11.6116