Year	Number
2004-01-01	28
2005-01-01	36
2006-01-01	47
2007-01-01	54
2008-01-01	57
2009-01-01	70
2010-01-01	77
2011-01-01	87
2012-01-01	73
2013-01-01	75
2014-01-01	75