Year	Number
2004-01-01	2
2005-01-01	8
2006-01-01	16
2007-01-01	29
2008-01-01	43
2009-01-01	66
2010-01-01	80
2011-01-01	97
2012-01-01	105
2013-01-01	122
2014-01-01	136
2015-01-01	174
2016-01-01	209
2017-01-01	248