Year	Percent
1991-01-01	44.4949
1992-01-01	44.4949
1993-01-01	96.1472
1994-01-01	96.6037
1995-01-01	99.6597
1996-01-01	99.0232
1997-01-01	99.0399
1998-01-01	99.5693
1999-01-01	99.7587
2000-01-01	99.7759
2001-01-01	99.8140
2002-01-01	99.8463
2003-01-01	99.8796
2004-01-01	99.9222
2005-01-01	99.9408
2006-01-01	99.9676
2007-01-01	99.9776
2008-01-01	99.9800
2009-01-01	99.9766
2010-01-01	99.9690
2011-01-01	99.9639
2012-01-01	99.9595
2013-01-01	99.9562
2014-01-01	99.9569
2015-01-01	99.7954
2016-01-01	99.6050