Year	Number
2004-01-01	171
2005-01-01	189
2006-01-01	193
2007-01-01	187
2008-01-01	181
2009-01-01	172
2010-01-01	160
2011-01-01	149
2012-01-01	111
2013-01-01	97
2014-01-01	96
2015-01-01	96
2016-01-01	89