Year	Number
2004-01-01	209
2005-01-01	205
2006-01-01	217
2007-01-01	217
2008-01-01	210
2009-01-01	212
2010-01-01	182
2011-01-01	180
2012-01-01	174
2013-01-01	167
2014-01-01	145
2015-01-01	145
2016-01-01	144
2017-01-01	137