Year	Number
2004-01-01	184.7596
2005-01-01	197.9264
2006-01-01	206.4792
2007-01-01	211.9891
2008-01-01	217.7378
2009-01-01	216.2007
2010-01-01	218.1557
2011-01-01	207.5524
2012-01-01	203.1110
2013-01-01	220.4873
2014-01-01	221.1377
2015-01-01	220.5556
2016-01-01	222.9892
2017-01-01	230.3224