Year	Percent
1998-01-01	24.1000
1999-01-01	26.1000
2000-01-01	36.8000
2001-01-01	45.7000
2002-01-01	46.9000
2003-01-01	49.9000
2004-01-01	51.4000
2005-01-01	61.9000
2006-01-01	61.8000
2007-01-01	53.7000
2008-01-01	46.4000
2009-01-01	40.6000
2010-01-01	43.2247
2011-01-01	45.7983
2012-01-01	45.5965
2013-01-01	49.2644
2014-01-01	55.7307
2015-01-01	67.7671
2016-01-01	68.8561