Year	Percent
1996-01-01	47.1008
1997-01-01	49.9037
1998-01-01	38.6069
1999-01-01	53.1865
2000-01-01	46.0883
2001-01-01	32.3886
2002-01-01	27.6500
2003-01-01	26.2172
2004-01-01	28.0831
2005-01-01	28.3300
2006-01-01	34.6456
2007-01-01	28.6905
2008-01-01	26.6952
2009-01-01	27.3515
2010-01-01	24.5462
2011-01-01	24.0156
2012-01-01	22.1814
2013-01-01	17.8951
2014-01-01	18.9816
2015-01-01	21.8971
2016-01-01	20.3347