Year	Number
2004-01-01	6
2005-01-01	12
2006-01-01	31
2007-01-01	48
2008-01-01	55
2009-01-01	59
2010-01-01	60
2011-01-01	58
2012-01-01	62
2013-01-01	72
2014-01-01	78
2015-01-01	93