Year	Percent
1996-01-01	21.916900000000000
1997-01-01	21.051600000000000
1998-01-01	16.630000000000000
1999-01-01	18.199800000000000
2000-01-01	13.660900000000000
2001-01-01	9.302210000000000
2002-01-01	7.976960000000001
2003-01-01	8.110060000000000
2004-01-01	9.208789999999999
2005-01-01	10.695100000000000
2006-01-01	10.963900000000000
2007-01-01	12.619400000000000
2008-01-01	12.624000000000000
2009-01-01	15.770999999999999
2010-01-01	15.097900000000000
2011-01-01	16.040100000000000
2012-01-01	15.152300000000000
2013-01-01	16.865300000000000
2014-01-01	20.473800000000000