Year	Number
2004-01-01	137
2005-01-01	134
2006-01-01	131
2007-01-01	128
2008-01-01	129
2009-01-01	125
2010-01-01	125
2011-01-01	128
2012-01-01	129
2013-01-01	124
2014-01-01	122
2015-01-01	123
2016-01-01	122
2017-01-01	121