Year	Percent
1996-01-01	63.2739
1997-01-01	64.7252
1998-01-01	74.6756
1999-01-01	77.6461
2000-01-01	88.8223
2001-01-01	84.7400
2002-01-01	75.9285
2003-01-01	81.7820
2004-01-01	94.2104
2005-01-01	43.5207
2006-01-01	44.4915
2007-01-01	54.8954
2008-01-01	62.5660
2009-01-01	63.7871
2010-01-01	69.0866
2011-01-01	70.6100
2012-01-01	70.0453
2013-01-01	71.5293
2014-01-01	73.3325
2015-01-01	71.6728
2016-01-01	71.1172