Year	Percent
1995-01-01	35.0976865400777
1996-01-01	35.9584086046500
1997-01-01	36.3662132506560
1998-01-01	36.5680272020409
1999-01-01	34.7227714477075
2000-01-01	34.1691565201021
2001-01-01	33.9768547826435
2002-01-01	32.2604875635017
2003-01-01	31.8500612618072
2004-01-01	32.4195825117206
2005-01-01	33.9755280378076
2006-01-01	33.7563153974248
2007-01-01	32.5522112345822
2008-01-01	32.1288700164853
2009-01-01	34.5808755420436
2010-01-01	35.8297917085391
2011-01-01	35.4219452135145
2012-01-01	36.6594997045360
2013-01-01	36.1706214833787
2014-01-01	36.2157848374260
2015-01-01	35.9433656038494
2016-01-01	36.5470307719858
2017-01-01	36.1505478767530