Year	Percent
1996-01-01	34.1744
1997-01-01	35.9786
1998-01-01	39.7708
1999-01-01	45.3595
2000-01-01	46.4953
2001-01-01	45.5344
2002-01-01	45.4642
2003-01-01	55.8287
2004-01-01	54.7708
2005-01-01	47.7245
2006-01-01	43.4937
2007-01-01	39.8270
2008-01-01	37.7276
2009-01-01	42.5601
2010-01-01	34.3190
2011-01-01	33.4251
2012-01-01	33.9257
2013-01-01	23.1616
2014-01-01	23.1217
2015-01-01	32.8237
2016-01-01	32.4230