Year	Percent
1996-01-01	58.0834
1997-01-01	98.3618
1998-01-01	96.8269
1999-01-01	85.2949
2000-01-01	88.0821
2001-01-01	77.7410
2002-01-01	66.4923
2003-01-01	45.5735
2004-01-01	49.2447
2005-01-01	45.2842
2006-01-01	47.1633
2007-01-01	37.7005
2008-01-01	26.1428
2009-01-01	21.6616
2010-01-01	24.1968
2011-01-01	24.7325
2012-01-01	24.3751
2013-01-01	26.5030
2014-01-01	26.5137
2015-01-01	32.7141
2016-01-01	32.3144