Year	Percent
1998-01-01	93.4773
1999-01-01	97.6553
2000-01-01	71.6000
2001-01-01	64.5000
2002-01-01	55.4583
2003-01-01	55.3825
2004-01-01	38.1027
2005-01-01	34.2771
2006-01-01	43.4854
2007-01-01	33.6540
2008-01-01	20.0131
2009-01-01	15.7372
2010-01-01	11.7925
2011-01-01	19.8865
2012-01-01	22.3469
2013-01-01	10.6416
2014-01-01	16.8438
2015-01-01	20.1539
2016-01-01	14.4078