Year	Percent
1996-01-01	37.8619
1997-01-01	36.6632
1998-01-01	38.8068
1999-01-01	34.8765
2000-01-01	35.6451
2001-01-01	21.6378
2002-01-01	20.9212
2003-01-01	54.9485
2004-01-01	39.1727
2005-01-01	37.5878
2006-01-01	36.7721
2007-01-01	37.6984
2008-01-01	33.1848
2009-01-01	36.9577
2010-01-01	36.8145
2011-01-01	39.6796
2012-01-01	36.8349
2013-01-01	38.6016
2014-01-01	40.7005