Year	Percent
1996-01-01	31.5974
1997-01-01	29.6088
1998-01-01	35.7174
1999-01-01	21.0653
2000-01-01	16.8539
2001-01-01	13.6342
2002-01-01	12.2009
2003-01-01	11.4057
2004-01-01	12.7397
2005-01-01	10.2597
2006-01-01	10.0522
2007-01-01	23.2668
2008-01-01	38.8842
2009-01-01	36.8027
2010-01-01	35.6588
2011-01-01	32.9264
2012-01-01	34.5538
2013-01-01	34.0891
2014-01-01	36.0302