Year	Number
2004-01-01	11
2005-01-01	14
2006-01-01	32
2007-01-01	16
2008-01-01	13
2009-01-01	13
2010-01-01	13
2011-01-01	17
2012-01-01	22
2013-01-01	30
2014-01-01	29
2015-01-01	39