Year	Number
2004-01-01	189
2005-01-01	191
2006-01-01	192
2007-01-01	202
2008-01-01	208
2009-01-01	215
2010-01-01	227
2011-01-01	239
2012-01-01	253
2013-01-01	254
2014-01-01	261
2015-01-01	262