Year	Percent
1994-01-01	30.4366
1995-01-01	33.3551
1996-01-01	39.4009
1997-01-01	55.5201
1998-01-01	57.7785
1999-01-01	59.1770
2000-01-01	60.0953
2001-01-01	61.6303
2002-01-01	64.9352
2003-01-01	62.2176
2004-01-01	63.3935
2005-01-01	66.3526
2006-01-01	70.4341
2007-01-01	73.1684
2008-01-01	72.7946
2009-01-01	64.8983
2010-01-01	58.9843
2011-01-01	65.1773
2012-01-01	69.2884
2013-01-01	71.4742
2014-01-01	72.1086
2015-01-01	72.8941
2016-01-01	72.8400