Year	Percent
1996-01-01	46.0332
1997-01-01	39.1386
1998-01-01	36.2234
1999-01-01	32.8474
2000-01-01	34.3173
2001-01-01	56.4792
2002-01-01	22.0859
2003-01-01	40.8907
2004-01-01	36.1966
2005-01-01	44.8735
2006-01-01	48.8777
2007-01-01	43.0334
2008-01-01	36.9769
2009-01-01	48.7802
2010-01-01	48.3749
2011-01-01	44.5281
2012-01-01	48.8084
2013-01-01	45.0952
2014-01-01	44.4678