Year	Percent
1996-01-01	39.110200000000000
1997-01-01	35.312000000000000
1998-01-01	32.683700000000000
1999-01-01	35.090200000000000
2000-01-01	35.875700000000000
2001-01-01	36.357900000000000
2002-01-01	40.193000000000005
2003-01-01	37.696500000000000
2004-01-01	41.716800000000000
2005-01-01	41.993200000000000
2006-01-01	36.576500000000000
2007-01-01	35.345600000000000
2008-01-01	33.353100000000000
2009-01-01	29.769100000000000
2010-01-01	30.519000000000002
2011-01-01	31.677700000000000
2012-01-01	23.381300000000000
2013-01-01	29.007600000000000
2014-01-01	34.596700000000000