Year	Number
2004-01-01	51
2005-01-01	56
2006-01-01	65
2007-01-01	73
2008-01-01	77
2009-01-01	88
2010-01-01	103
2011-01-01	117
2012-01-01	130
2013-01-01	161
2014-01-01	162
2015-01-01	169
2016-01-01	174