Year	Number
2004-01-01	19
2005-01-01	25
2006-01-01	24
2007-01-01	39
2008-01-01	52
2009-01-01	53
2010-01-01	67
2011-01-01	81
2012-01-01	103
2013-01-01	123
2014-01-01	129
2015-01-01	147
2016-01-01	155