Year	Number
2004-01-01	103
2005-01-01	103
2006-01-01	103
2007-01-01	77
2008-01-01	51
2009-01-01	49
2010-01-01	62
2011-01-01	62
2012-01-01	60
2013-01-01	59
2014-01-01	58
2015-01-01	58
2016-01-01	60