Year	Percent
1996-01-01	50.8160
1997-01-01	50.7978
1998-01-01	36.9319
1999-01-01	49.6170
2000-01-01	38.7712
2001-01-01	42.4947
2002-01-01	28.9098
2003-01-01	26.4769
2004-01-01	20.7838
2005-01-01	16.0225
2006-01-01	15.5611
2007-01-01	15.2466
2008-01-01	19.5025
2009-01-01	17.6962
2010-01-01	15.5996
2011-01-01	15.1982
2012-01-01	17.1840
2013-01-01	21.4856
2014-01-01	22.2325
2015-01-01	24.2502
2016-01-01	22.2237