Year	Percent
1996-01-01	68.6224
1997-01-01	66.8033
1998-01-01	68.2896
1999-01-01	69.7996
2000-01-01	74.8562
2001-01-01	73.6131
2002-01-01	71.9091
2003-01-01	65.1372
2004-01-01	62.3959
2005-01-01	63.0108
2006-01-01	67.3838
2007-01-01	74.3346
2008-01-01	74.7911
2009-01-01	75.2414
2010-01-01	89.3501
2011-01-01	95.2501
2012-01-01	42.8145
2013-01-01	42.6582
2014-01-01	41.6036
2015-01-01	41.6355
2016-01-01	43.3310