Year	Percent
1992-01-01	79.872000000000000
1993-01-01	43.046200000000000
1994-01-01	8.967980000000000
1995-01-01	6.121110000000000
1996-01-01	7.243360000000001
1997-01-01	7.842480000000000
1998-01-01	8.806430000000000
1999-01-01	10.542300000000000
2000-01-01	12.575300000000000
2001-01-01	13.284800000000000
2002-01-01	13.497700000000000
2003-01-01	13.570900000000000
2004-01-01	13.697700000000000
2005-01-01	14.584000000000001
2006-01-01	16.103400000000000
2007-01-01	18.480200000000000
2008-01-01	20.052400000000000
2009-01-01	19.698400000000000
2010-01-01	16.131600000000000
2011-01-01	17.997600000000000
2012-01-01	19.837000000000000
2013-01-01	22.992800000000000
2014-01-01	24.906300000000000
2015-01-01	27.625700000000000
2016-01-01	31.613600000000000