Year	Percent
1996-01-01	49.064400000000000
1997-01-01	29.952400000000000
1998-01-01	32.267400000000000
1999-01-01	30.446800000000000
2000-01-01	28.890000000000000
2001-01-01	26.060800000000000
2002-01-01	11.671500000000000
2003-01-01	29.834100000000000
2004-01-01	30.471999999999998
2005-01-01	39.672600000000000
2006-01-01	38.279100000000000
2007-01-01	36.121100000000000
2008-01-01	28.594500000000000
2009-01-01	18.330400000000000
2010-01-01	12.730600000000000
2011-01-01	24.343700000000000
2012-01-01	19.783800000000000
2013-01-01	24.824400000000000
2014-01-01	29.346900000000000
2015-01-01	37.162100000000000
2016-01-01	28.722800000000000