Year	Number
2004-01-01	26
2005-01-01	27
2006-01-01	29
2007-01-01	35
2008-01-01	38
2009-01-01	38
2010-01-01	44
2011-01-01	45
2012-01-01	50
2013-01-01	54
2014-01-01	53
2015-01-01	59
2016-01-01	65
2017-01-01	69