Year	Percent
1993-01-01	90.8944
1994-01-01	76.9440
1995-01-01	48.3161
1996-01-01	27.5109
1997-01-01	28.1317
1998-01-01	22.5507
1999-01-01	19.0298
2000-01-01	19.1776
2001-01-01	19.8834
2002-01-01	19.8185
2003-01-01	19.8232
2004-01-01	21.4567
2005-01-01	23.6275
2006-01-01	27.9624
2007-01-01	32.9485
2008-01-01	39.7947
2009-01-01	44.9604
2010-01-01	46.0948
2011-01-01	47.4899
2012-01-01	51.4148
2013-01-01	52.4438
2014-01-01	53.2457
2015-01-01	54.5189
2016-01-01	53.2755