Year	Number
2006-01-01	289
2007-01-01	1637
2008-01-01	2672
2009-01-01	3010
2010-01-01	4768
2011-01-01	39339
2012-01-01	4355
2013-01-01	4527
2014-01-01	2220
2015-01-01	1156
2016-01-01	1133
2017-01-01	1025