Year	Percent
1996-01-01	42.5612
1997-01-01	45.0489
1998-01-01	19.1617
1999-01-01	57.8799
2000-01-01	56.3639
2001-01-01	50.5683
2002-01-01	50.7531
2003-01-01	43.1704
2004-01-01	48.2614
2005-01-01	48.0718
2006-01-01	38.7528
2007-01-01	33.6661
2008-01-01	40.2820
2009-01-01	23.8525
2010-01-01	31.3936
2011-01-01	26.5750
2012-01-01	35.1275
2013-01-01	33.2657
2014-01-01	41.6923