Year	Number
2004-01-01	181
2005-01-01	171
2006-01-01	162
2007-01-01	157
2008-01-01	152
2009-01-01	147
2010-01-01	145
2011-01-01	142
2012-01-01	133
2013-01-01	129
2014-01-01	127
2015-01-01	118
2016-01-01	118
2017-01-01	114