Year	Percent
1998-01-01	61.291500000000000
1999-01-01	61.023300000000000
2000-01-01	57.900000000000000
2001-01-01	41.000000000000000
2002-01-01	24.848000000000003
2003-01-01	18.169600000000000
2004-01-01	34.902900000000000
2005-01-01	32.131900000000000
2006-01-01	44.272000000000000
2007-01-01	52.668300000000000
2008-01-01	31.180999999999997
2009-01-01	32.277900000000000
2010-01-01	31.134300000000000
2011-01-01	31.775500000000000
2012-01-01	29.230200000000000