Year	Number
2004-01-01	23
2005-01-01	39
2006-01-01	50
2007-01-01	75
2008-01-01	90
2009-01-01	104
2010-01-01	113
2011-01-01	131
2012-01-01	152
2013-01-01	163
2014-01-01	165
2015-01-01	187