Year	Number
2004-01-01	204
2005-01-01	190
2006-01-01	182
2007-01-01	179
2008-01-01	179
2009-01-01	168
2010-01-01	162
2011-01-01	158
2012-01-01	160
2013-01-01	161
2014-01-01	158
2015-01-01	156
2016-01-01	151
2017-01-01	146