Year	Number
2005-01-01	47
2006-01-01	48
2007-01-01	48
2008-01-01	48
2009-01-01	49
2010-01-01	52
2011-01-01	52
2012-01-01	53
2013-01-01	62
2014-01-01	62
2015-01-01	62
2016-01-01	63