Year	Number
2005-01-01	24
2006-01-01	21
2007-01-01	30
2008-01-01	34
2009-01-01	31
2010-01-01	28
2011-01-01	28
2012-01-01	27
2013-01-01	27
2014-01-01	27
2015-01-01	27
2016-01-01	27