Year	Number
2004-01-01	35
2005-01-01	38
2006-01-01	30
2007-01-01	8
2008-01-01	17
2009-01-01	17
2010-01-01	17
2011-01-01	15
2012-01-01	17
2013-01-01	17
2014-01-01	17