Year	Percent
1993-01-01	50.2704
1994-01-01	48.6921
1995-01-01	49.5503
1996-01-01	51.5558
1997-01-01	51.9657
1998-01-01	51.1486
1999-01-01	52.0499
2000-01-01	53.5548
2001-01-01	55.5893
2002-01-01	53.9784
2003-01-01	53.0486
2004-01-01	51.4635
2005-01-01	47.9552
2006-01-01	46.8154
2007-01-01	44.6762
2008-01-01	47.2940
2009-01-01	51.3540
2010-01-01	46.6547
2011-01-01	45.3839
2012-01-01	45.6907
2013-01-01	47.6958
2014-01-01	48.4241
2015-01-01	49.9601
2016-01-01	52.2252