Year	Percent
1996-01-01	24.2794
1997-01-01	25.8955
1998-01-01	30.8899
1999-01-01	25.9602
2000-01-01	29.5451
2001-01-01	39.9597
2002-01-01	43.1056
2003-01-01	45.8835
2004-01-01	47.1443
2005-01-01	49.8819
2006-01-01	62.0890
2007-01-01	67.1468
2008-01-01	66.2098
2009-01-01	66.4676
2010-01-01	66.6248
2011-01-01	67.6857
2012-01-01	67.2532
2013-01-01	66.9946
2014-01-01	66.6065
2015-01-01	66.5872
2016-01-01	66.7724