Year	Percent
1994-01-01	77.9461
1995-01-01	75.4311
1996-01-01	73.6425
1997-01-01	77.1319
1998-01-01	79.6778
1999-01-01	77.4114
2000-01-01	82.2646
2001-01-01	79.5269
2002-01-01	81.1420
2003-01-01	83.0171
2004-01-01	87.7814
2005-01-01	91.6728
2006-01-01	92.4012
2007-01-01	92.5643
2008-01-01	93.1669
2009-01-01	94.7457
2010-01-01	95.1046
2011-01-01	96.4414
2012-01-01	98.8870
2013-01-01	99.2266
2014-01-01	98.8202
2015-01-01	98.5916
2016-01-01	98.7822