Year	Percent
1996-01-01	30.366400000000000
1997-01-01	32.326400000000000
1998-01-01	29.471600000000000
1999-01-01	34.618300000000000
2000-01-01	37.793100000000000
2001-01-01	36.059500000000000
2002-01-01	30.506999999999998
2003-01-01	31.153100000000000
2004-01-01	30.642200000000000
2005-01-01	34.205800000000000
2006-01-01	40.717700000000000
2007-01-01	35.418400000000000
2008-01-01	24.276500000000000
2009-01-01	37.916000000000000
2010-01-01	36.656000000000000
2011-01-01	32.841000000000000
2012-01-01	37.828100000000000
2013-01-01	42.035900000000000
2014-01-01	40.319800000000000