Year	Number
2005-01-01	49
2006-01-01	49
2007-01-01	50
2008-01-01	50
2009-01-01	50
2010-01-01	48
2011-01-01	49
2012-01-01	49
2013-01-01	48
2014-01-01	48
2015-01-01	48