Year	Percent
1997-01-01	33.3333
1998-01-01	68.3333
1999-01-01	48.3904
2000-01-01	32.8674
2001-01-01	35.9917
2002-01-01	25.7592
2003-01-01	21.9602
2004-01-01	19.5728
2005-01-01	15.2888
2006-01-01	13.4778
2007-01-01	12.1997
2008-01-01	15.0308
2009-01-01	24.5346
2010-01-01	15.6986
2011-01-01	14.7031
2012-01-01	13.8962
2013-01-01	17.1845
2014-01-01	14.2688