Year	Percent
1996-01-01	44.367600000000000
1997-01-01	45.587600000000000
1998-01-01	46.353100000000000
1999-01-01	50.992000000000000
2000-01-01	47.802400000000000
2001-01-01	56.878800000000000
2002-01-01	35.543400000000000
2003-01-01	41.438500000000000
2004-01-01	45.306000000000004
2005-01-01	43.715800000000000
2006-01-01	46.569500000000000
2007-01-01	50.761700000000000
2008-01-01	49.691800000000000
2009-01-01	47.183600000000000
2010-01-01	41.159800000000000
2011-01-01	49.695400000000000
2012-01-01	42.454100000000000
2013-01-01	38.303100000000000
2014-01-01	26.218100000000000
2015-01-01	31.133700000000000
2016-01-01	29.429400000000000