Year	Number
2004-01-01	99.1817
2005-01-01	111.8540
2006-01-01	134.8747
2007-01-01	146.9779
2008-01-01	154.9357
2009-01-01	161.8402
2010-01-01	165.1174
2011-01-01	183.3373
2012-01-01	196.8799
2013-01-01	208.2325
2014-01-01	215.8175
2015-01-01	230.6187
2016-01-01	236.4031
2017-01-01	242.3366