Year	Number
2004-01-01	165
2005-01-01	170
2006-01-01	173
2007-01-01	184
2008-01-01	187
2009-01-01	179
2010-01-01	176
2011-01-01	159
2012-01-01	137
2013-01-01	124
2014-01-01	124
2015-01-01	124