Year	Percent
1996-01-01	26.026100000000000
1997-01-01	19.731200000000000
1998-01-01	23.686800000000000
1999-01-01	41.205000000000000
2000-01-01	49.208400000000000
2001-01-01	43.249100000000000
2002-01-01	39.455000000000000
2003-01-01	26.276999999999997
2004-01-01	19.694000000000003
2005-01-01	26.294200000000000
2006-01-01	37.910100000000000
2007-01-01	46.751900000000000
2008-01-01	35.715100000000000
2009-01-01	35.775700000000000
2010-01-01	35.290300000000000
2011-01-01	33.316600000000000
2012-01-01	37.948500000000000
2013-01-01	41.917200000000000
2014-01-01	42.623999999999995
2015-01-01	45.166200000000000
2016-01-01	45.608999999999995