Year	Number
2004-01-01	15
2005-01-01	18
2006-01-01	21
2007-01-01	24
2008-01-01	56
2009-01-01	65
2010-01-01	62
2011-01-01	92
2012-01-01	94
2013-01-01	84
2014-01-01	48
2015-01-01	49
2016-01-01	48