Year	Number
2004-01-01	172
2005-01-01	177
2006-01-01	176
2007-01-01	178
2008-01-01	191
2009-01-01	205
2010-01-01	201
2011-01-01	197
2012-01-01	194
2013-01-01	192
2014-01-01	193
2015-01-01	197
2016-01-01	188