Year	Number
2004-01-01	0
2005-01-01	4
2006-01-01	4
2007-01-01	5
2008-01-01	16
2009-01-01	20
2010-01-01	26
2011-01-01	30
2012-01-01	26
2013-01-01	51
2014-01-01	65
2015-01-01	84
2016-01-01	107
2017-01-01	121