Year	Percent
1990-01-01	0.66863500000000010
1991-01-01	0.56055500000000000
1992-01-01	0.48483000000000004
1993-01-01	0.34944300000000000
1994-01-01	0.39045400000000000
1995-01-01	0.45471900000000000
1996-01-01	0.58681600000000000
1997-01-01	0.73161700000000000
1998-01-01	0.80061300000000000
1999-01-01	0.63239600000000000
2000-01-01	0.60746400000000000
2001-01-01	0.64077500000000000
2002-01-01	0.79618700000000000
2003-01-01	0.71917600000000000
2004-01-01	0.61692000000000000
2005-01-01	0.57424800000000000
2006-01-01	0.56767700000000010
2007-01-01	0.53032800000000000
2008-01-01	0.47712100000000000
2009-01-01	0.38659099999999996
2010-01-01	0.44910200000000006
2011-01-01	0.45010700000000000
2012-01-01	0.48274700000000004
2013-01-01	0.50314100000000000
2014-01-01	0.43136700000000000
2015-01-01	0.40234200000000003
2016-01-01	0.39086000000000000