Year	Number
2004-01-01	83.8936
2005-01-01	83.5798
2006-01-01	83.1154
2007-01-01	86.7114
2008-01-01	87.6071
2009-01-01	87.3749
2010-01-01	91.7612
2011-01-01	93.2357
2012-01-01	94.0342
2013-01-01	93.7351
2014-01-01	90.4914
2015-01-01	90.0171
2016-01-01	88.2275