Year	Number
2005-01-01	51
2006-01-01	65
2007-01-01	112
2008-01-01	139
2009-01-01	152
2010-01-01	197
2011-01-01	198
2012-01-01	211
2013-01-01	216
2014-01-01	220
2015-01-01	199
2016-01-01	180