Year	Percent
1996-01-01	23.5574
1997-01-01	24.7958
1998-01-01	24.7304
1999-01-01	24.2972
2000-01-01	18.0250
2001-01-01	21.8669
2002-01-01	22.2623
2003-01-01	28.1385
2004-01-01	27.9435
2005-01-01	29.1419
2006-01-01	28.2279
2007-01-01	28.8200
2008-01-01	26.7191
2009-01-01	22.6309
2010-01-01	21.2082
2011-01-01	24.4568
2012-01-01	26.1321
2013-01-01	28.4630
2014-01-01	25.5236