Year	Number
2004-01-01	3
2005-01-01	3
2006-01-01	3
2007-01-01	5
2008-01-01	15
2009-01-01	18
2010-01-01	18
2011-01-01	18
2012-01-01	45
2013-01-01	49
2014-01-01	82
2015-01-01	83
2016-01-01	83