Year	Number
2004-01-01	68.9672
2005-01-01	73.9821
2006-01-01	75.5710
2007-01-01	81.5789
2008-01-01	85.9484
2009-01-01	88.6792
2010-01-01	90.0695
2011-01-01	91.6087
2012-01-01	88.8282
2013-01-01	88.1331
2014-01-01	84.0119
2015-01-01	83.3664
2016-01-01	83.2175
2017-01-01	81.7279