Year	Percent
1996-01-01	29.492400000000000
1997-01-01	34.246900000000000
1998-01-01	25.980500000000000
1999-01-01	40.952600000000000
2000-01-01	42.229700000000000
2001-01-01	34.952800000000000
2002-01-01	35.660700000000000
2003-01-01	34.266400000000000
2004-01-01	31.121400000000000
2005-01-01	22.622800000000000
2006-01-01	28.150200000000000
2007-01-01	26.591700000000000
2008-01-01	27.826400000000000
2009-01-01	29.778800000000000
2010-01-01	26.983700000000000
2011-01-01	25.100700000000000
2012-01-01	25.374000000000002
2013-01-01	23.392600000000000
2014-01-01	25.964300000000000
2015-01-01	22.698200000000000
2016-01-01	23.235200000000000