Year	Percent
1996-01-01	15.9973
1997-01-01	22.0661
1998-01-01	20.4906
1999-01-01	22.7046
2000-01-01	21.5015
2001-01-01	53.7523
2002-01-01	10.0152
2003-01-01	56.3311
2004-01-01	31.3125
2005-01-01	32.0416
2006-01-01	35.7918
2007-01-01	38.3426
2008-01-01	30.1631
2009-01-01	34.4446
2010-01-01	40.8826
2011-01-01	37.2208
2012-01-01	40.8780
2013-01-01	34.7202
2014-01-01	34.4761