Year	Number
2004-01-01	71
2005-01-01	231
2006-01-01	261
2007-01-01	326
2008-01-01	17
2009-01-01	112
2010-01-01	130
2011-01-01	162
2012-01-01	166
2013-01-01	160
2014-01-01	164
2015-01-01	166
2016-01-01	198