Year	Percent
1990-01-01	0.07962700000000000
1991-01-01	0.18407700000000000
1992-01-01	0.19136199999999998
1993-01-01	0.19195000000000000
1994-01-01	0.19976400000000000
1995-01-01	0.20311099999999999
1996-01-01	0.20079900000000000
1997-01-01	0.20272400000000000
1998-01-01	0.18984700000000002
1999-01-01	0.17552100000000000
2000-01-01	0.18016400000000002
2001-01-01	0.16331800000000002
2002-01-01	0.19586900000000002
2003-01-01	0.19556800000000002
2004-01-01	0.21020600000000000
2005-01-01	0.21326399999999998
2006-01-01	0.18700400000000000
2007-01-01	0.19430999999999998
2008-01-01	0.20014900000000000
2009-01-01	0.19710800000000000
2010-01-01	0.20743600000000000
2011-01-01	0.21017900000000000
2012-01-01	0.20351800000000000
2013-01-01	0.19148800000000002
2014-01-01	0.18189000000000000
2015-01-01	0.17207100000000000