Year	Number
2004-01-01	222.2730
2005-01-01	265.1183
2006-01-01	273.2998
2007-01-01	278.6883
2008-01-01	287.9330
2009-01-01	297.7793
2010-01-01	360.5171
2011-01-01	321.0277
2012-01-01	333.0888
2013-01-01	452.2564
2014-01-01	488.1219
2015-01-01	525.7148
2016-01-01	568.1397