Year	Percent
1990-01-01	18.183300000000000
1991-01-01	21.776800000000000
1992-01-01	21.925200000000000
1993-01-01	19.460000000000000
1994-01-01	23.804000000000002
1995-01-01	30.484900000000000
1996-01-01	35.301800000000000
1997-01-01	35.855300000000000
1998-01-01	41.229700000000000
1999-01-01	41.156900000000000
2000-01-01	32.791500000000000
2001-01-01	35.753700000000000
2002-01-01	35.627700000000000
2003-01-01	35.833000000000000
2004-01-01	35.613000000000000
2005-01-01	56.358700000000000
2006-01-01	61.263500000000000
2007-01-01	61.454400000000000
2008-01-01	49.697900000000000
2009-01-01	55.670400000000000
2010-01-01	60.356100000000000
2011-01-01	54.351600000000000
2012-01-01	64.941700000000000
2013-01-01	56.158900000000000
2014-01-01	54.016300000000000
2015-01-01	46.242900000000000
2016-01-01	44.414100000000000