Year	Number
2004-01-01	7
2005-01-01	41
2006-01-01	50
2007-01-01	64
2008-01-01	93
2009-01-01	111
2010-01-01	139
2011-01-01	199
2012-01-01	229
2013-01-01	289
2014-01-01	331