Year	Number
2004-01-01	152
2005-01-01	220
2006-01-01	267
2007-01-01	321
2008-01-01	405
2009-01-01	536
2010-01-01	599
2011-01-01	663
2012-01-01	748
2013-01-01	893
2014-01-01	851
2015-01-01	922
2016-01-01	942