Year	Percent
1996-01-01	41.9820
1997-01-01	45.1612
1998-01-01	45.9885
1999-01-01	37.5956
2000-01-01	41.0711
2001-01-01	44.6704
2002-01-01	45.8239
2003-01-01	47.2798
2004-01-01	43.1087
2005-01-01	40.8296
2006-01-01	39.0041
2007-01-01	35.2183
2008-01-01	29.9089
2009-01-01	44.1004
2010-01-01	42.9576
2011-01-01	35.6307
2012-01-01	42.3686
2013-01-01	51.5692
2014-01-01	44.6752