Year	Number
2004-01-01	170
2005-01-01	140
2006-01-01	165
2007-01-01	121
2008-01-01	158
2009-01-01	175
2010-01-01	153
2011-01-01	164
2012-01-01	167
2013-01-01	156
2014-01-01	176
2015-01-01	173
2016-01-01	171