Year	Percent
1996-01-01	20.20900
1997-01-01	16.30650
1998-01-01	9.59115
1999-01-01	4.11430
2000-01-01	2.69653
2001-01-01	4.08898
2002-01-01	7.88328
2003-01-01	10.63670
2004-01-01	13.97790
2005-01-01	22.60930
2006-01-01	23.92360
2007-01-01	28.09610
2008-01-01	30.68060
2009-01-01	25.15090
2010-01-01	23.62940
2011-01-01	23.70590
2012-01-01	22.68610
2013-01-01	20.06250
2014-01-01	19.26200
2015-01-01	16.63410
2016-01-01	23.04810