Year	Number
2006-01-01	239
2007-01-01	236
2008-01-01	239
2009-01-01	242
2010-01-01	241
2011-01-01	236
2012-01-01	221
2013-01-01	232
2014-01-01	220
2015-01-01	205
2016-01-01	160