Year	Percent
1996-01-01	46.1723
1997-01-01	46.5302
1998-01-01	50.2989
1999-01-01	49.0345
2000-01-01	49.6759
2001-01-01	48.4314
2002-01-01	48.6487
2003-01-01	49.2335
2004-01-01	47.1717
2005-01-01	44.1956
2006-01-01	44.8106
2007-01-01	45.9234
2008-01-01	44.5569
2009-01-01	46.3186
2010-01-01	47.1372
2011-01-01	46.1416
2012-01-01	47.1600
2013-01-01	47.1921
2014-01-01	49.2026
2015-01-01	44.9762
2016-01-01	44.3743