Year	Number
2004-01-01	25.6628
2005-01-01	28.2747
2006-01-01	31.2699
2007-01-01	35.8984
2008-01-01	38.2911
2009-01-01	41.9292
2010-01-01	43.7269
2011-01-01	52.3572
2012-01-01	54.2938
2013-01-01	72.1411
2014-01-01	79.6151
2015-01-01	61.2269
2016-01-01	63.8794
2017-01-01	65.7784