Year	Number
2004-01-01	90
2005-01-01	114
2006-01-01	125
2007-01-01	161
2008-01-01	199
2009-01-01	233
2010-01-01	236
2011-01-01	237
2012-01-01	277
2013-01-01	252
2014-01-01	253
2015-01-01	251