Year	Percent
1991-01-01	7.320060000000001
1992-01-01	8.859400000000000
1993-01-01	13.761700000000000
1994-01-01	17.217700000000000
1995-01-01	14.032100000000000
1996-01-01	14.729000000000001
1997-01-01	15.138100000000000
1998-01-01	18.289400000000000
1999-01-01	18.234600000000000
2000-01-01	21.567400000000000
2001-01-01	20.489700000000000
2002-01-01	24.889000000000000
2003-01-01	31.732900000000000
2004-01-01	33.253500000000000
2005-01-01	32.994200000000000
2006-01-01	44.162400000000000
2007-01-01	50.561100000000000
2008-01-01	49.453999999999990
2009-01-01	63.592400000000000
2010-01-01	89.549700000000000
2011-01-01	93.182600000000000
2012-01-01	84.748300000000000
2013-01-01	80.470000000000000
2014-01-01	75.468800000000000
2015-01-01	79.693500000000000
2016-01-01	51.313100000000000