Year	Percent
1998-01-01	69.1451
1999-01-01	62.2443
2000-01-01	62.2443
2001-01-01	60.3000
2002-01-01	41.5574
2003-01-01	44.9589
2004-01-01	31.8522
2005-01-01	40.7236
2006-01-01	51.3582
2007-01-01	52.2814
2008-01-01	49.5277
2009-01-01	11.0972
2010-01-01	53.2048
2011-01-01	87.8544
2012-01-01	67.0512
2013-01-01	67.0315
2014-01-01	58.3548
2015-01-01	59.3823
2016-01-01	61.9790