Year	Percent
1996-01-01	43.7760
1997-01-01	42.0930
1998-01-01	45.3027
1999-01-01	41.5557
2000-01-01	50.4994
2001-01-01	56.4406
2002-01-01	61.8865
2003-01-01	68.9048
2004-01-01	66.0543
2005-01-01	48.7193
2006-01-01	46.4056
2007-01-01	36.2153
2008-01-01	29.1841
2009-01-01	23.7815
2010-01-01	22.0932
2011-01-01	25.1725
2012-01-01	27.3893
2013-01-01	31.8594
2014-01-01	28.6508
2015-01-01	35.1523
2016-01-01	36.7313