Year	Percent
1991-01-01	69.375000000000000
1992-01-01	29.206999999999997
1993-01-01	13.017000000000001
1994-01-01	23.376600000000000
1995-01-01	24.991000000000000
1996-01-01	18.044000000000000
1997-01-01	15.013600000000000
1998-01-01	20.839600000000000
1999-01-01	30.473700000000000
2000-01-01	29.037300000000000
2001-01-01	17.966300000000000
2002-01-01	26.222300000000000
2003-01-01	33.394300000000000
2004-01-01	48.557800000000000
2005-01-01	49.935500000000000
2006-01-01	41.668800000000000
2007-01-01	41.162800000000000
2008-01-01	83.489700000000000
2009-01-01	75.512200000000000
2010-01-01	50.938000000000000
2011-01-01	40.936900000000000
2012-01-01	49.331600000000000
2013-01-01	56.456300000000000
2014-01-01	57.852600000000000
2015-01-01	57.382800000000000