Year	Percent
1998-01-01	36.7000
1999-01-01	41.8000
2000-01-01	35.6000
2001-01-01	31.1000
2002-01-01	25.2000
2003-01-01	22.0000
2004-01-01	16.6000
2005-01-01	15.3000
2006-01-01	14.5000
2007-01-01	13.8000
2008-01-01	14.9000
2009-01-01	17.0000
2010-01-01	17.3856
2011-01-01	17.5535
2012-01-01	16.6418
2013-01-01	16.9722
2014-01-01	21.9491
2015-01-01	22.1787
2016-01-01	22.1514