Year	Percent
1996-01-01	26.6932
1997-01-01	59.8726
1998-01-01	85.4901
1999-01-01	41.7422
2000-01-01	35.7236
2001-01-01	33.1417
2002-01-01	36.9350
2003-01-01	36.9317
2004-01-01	38.4028
2005-01-01	38.3034
2006-01-01	37.0981
2007-01-01	35.1389
2008-01-01	35.4472
2009-01-01	42.7684
2010-01-01	37.3731
2011-01-01	40.2448
2012-01-01	45.1399
2013-01-01	47.9051
2014-01-01	48.4466