Year	Number
2004-01-01	31
2005-01-01	35
2006-01-01	40
2007-01-01	44
2008-01-01	49
2009-01-01	54
2010-01-01	66
2011-01-01	72
2012-01-01	78
2013-01-01	99
2014-01-01	120
2015-01-01	125