Year	Percent
1996-01-01	26.6298
1997-01-01	32.8239
1998-01-01	25.5022
1999-01-01	24.8973
2000-01-01	24.8394
2001-01-01	21.7771
2002-01-01	24.2095
2003-01-01	28.8535
2004-01-01	30.7385
2005-01-01	30.4323
2006-01-01	33.4395
2007-01-01	36.0892
2008-01-01	29.9415
2009-01-01	30.2614
2010-01-01	26.5925
2011-01-01	25.7402
2012-01-01	22.5282
2013-01-01	22.7501
2014-01-01	23.7873
2015-01-01	26.4413
2016-01-01	19.6139