Year	Number
2004-01-01	28
2005-01-01	32
2006-01-01	49
2007-01-01	57
2008-01-01	79
2009-01-01	84
2010-01-01	85
2011-01-01	85
2012-01-01	85
2013-01-01	87
2014-01-01	85
2015-01-01	83