Year	Percent
1996-01-01	40.68900000000000
1997-01-01	34.42780000000000
1998-01-01	34.22170000000000
1999-01-01	33.05440000000000
2000-01-01	32.14680000000000
2001-01-01	41.82090000000000
2002-01-01	68.93330000000000
2003-01-01	74.79899999999999
2004-01-01	69.68110000000000
2005-01-01	68.05870000000000
2006-01-01	66.60650000000000
2007-01-01	54.55890000000000
2008-01-01	52.28780000000000
2009-01-01	51.10760000000000
2010-01-01	48.51660000000000
2011-01-01	46.59620000000000
2012-01-01	43.65970000000000
2013-01-01	44.04420000000000
2014-01-01	40.12110000000000
2015-01-01	38.42560000000000
2016-01-01	37.28130000000000