Year	Number
2004-01-01	61
2005-01-01	68
2006-01-01	122
2007-01-01	135
2008-01-01	180
2009-01-01	191
2010-01-01	194
2011-01-01	198
2012-01-01	200
2013-01-01	200
2014-01-01	195
2015-01-01	192
2016-01-01	192