Year	Number
2004-01-01	220
2005-01-01	220
2006-01-01	220
2007-01-01	220
2008-01-01	220
2009-01-01	221
2010-01-01	221
2011-01-01	221
2012-01-01	221
2013-01-01	221
2014-01-01	221
2015-01-01	223
2016-01-01	223