Year	Percent
1996-01-01	44.5547
1997-01-01	36.2895
1998-01-01	41.2070
1999-01-01	41.3077
2000-01-01	42.8461
2001-01-01	35.3966
2002-01-01	33.3628
2003-01-01	26.9092
2004-01-01	31.8243
2005-01-01	33.6341
2006-01-01	36.0521
2007-01-01	33.6294
2008-01-01	30.6655
2009-01-01	32.9987
2010-01-01	28.4866
2011-01-01	25.1813
2012-01-01	28.2997
2013-01-01	29.4613
2014-01-01	30.4188