Year	Percent
1996-01-01	32.2749
1997-01-01	32.4245
1998-01-01	34.9612
1999-01-01	32.9615
2000-01-01	22.3404
2001-01-01	10.6808
2002-01-01	14.7479
2003-01-01	19.3551
2004-01-01	21.0565
2005-01-01	25.7628
2006-01-01	33.6071
2007-01-01	32.0138
2008-01-01	24.6735
2009-01-01	25.0853
2010-01-01	29.4123
2011-01-01	32.6143
2012-01-01	33.2885
2013-01-01	38.7946
2014-01-01	31.7096
2015-01-01	11.9626
2016-01-01	12.6418