Year	Percent
1997-01-01	18.5185
1998-01-01	33.3333
1999-01-01	40.0000
2000-01-01	42.1053
2001-01-01	37.5000
2002-01-01	37.1429
2003-01-01	35.4839
2004-01-01	27.4510
2005-01-01	29.2308
2006-01-01	29.3333
2007-01-01	22.3881
2008-01-01	15.0685
2009-01-01	25.7426
2010-01-01	24.5902
2011-01-01	23.4043
2012-01-01	48.1499
2013-01-01	52.8545
2014-01-01	63.0769