Year	Percent
1996-01-01	36.8645
1997-01-01	38.3367
1998-01-01	34.9454
1999-01-01	33.2486
2000-01-01	38.8667
2001-01-01	41.9560
2002-01-01	42.3616
2003-01-01	42.3311
2004-01-01	37.4277
2005-01-01	40.7592
2006-01-01	40.0360
2007-01-01	40.1376
2008-01-01	42.1838
2009-01-01	43.1282
2010-01-01	50.5045
2011-01-01	52.7636
2012-01-01	48.2962
2013-01-01	51.6384
2014-01-01	54.3588