Year	Percent
1995-01-01	38.6558669665528
1996-01-01	39.6355178824823
1997-01-01	40.7899994897076
1998-01-01	39.8897571517741
1999-01-01	38.4430841089922
2000-01-01	37.1266762871308
2001-01-01	36.7689469795196
2002-01-01	34.7413399480675
2003-01-01	33.5220928706829
2004-01-01	33.9339297223143
2005-01-01	34.3001345916135
2006-01-01	33.7757725412536
2007-01-01	33.5105865251864
2008-01-01	33.2032923963111
2009-01-01	34.7453834462610
2010-01-01	35.1785770697631
2011-01-01	35.5451228012606
2012-01-01	36.3153021867749
2013-01-01	36.1720547744565
2014-01-01	35.3699933446398
2015-01-01	35.5743788481337
2016-01-01	35.9745381260430
2017-01-01	36.0176087810104