Year	Percent
1987-01-01	0.05539600000000000
1988-01-01	0.03670300000000000
1989-01-01	0.03809500000000000
1990-01-01	0.04943800000000000
1991-01-01	0.04628900000000000
1992-01-01	0.04628900000000000
1993-01-01	0.08414600000000000
1994-01-01	0.35524700000000000
1995-01-01	0.33731900000000000
1996-01-01	0.43237100000000000
1997-01-01	0.46613800000000000
1998-01-01	0.52308800000000000
1999-01-01	0.47001600000000000
2000-01-01	0.43318000000000000
2001-01-01	0.44481300000000000
2002-01-01	0.35555900000000000
2003-01-01	0.37197800000000003
2004-01-01	0.35551900000000003
2005-01-01	0.27512700000000000
2006-01-01	0.19953800000000002
2007-01-01	0.15842400000000000
2008-01-01	0.09235000000000000
2009-01-01	0.07230000000000000
2010-01-01	0.07818600000000000
2011-01-01	0.09288800000000000
2012-01-01	0.15710700000000000
2013-01-01	0.15539000000000000
2014-01-01	0.14633600000000000
2015-01-01	0.11148800000000002
2016-01-01	0.13119800000000000