Year	Number
2006-01-01	513
2007-01-01	515
2008-01-01	525
2009-01-01	774
2010-01-01	871
2011-01-01	875
2012-01-01	992
2013-01-01	1014
2014-01-01	1034
2015-01-01	990
2016-01-01	838
2017-01-01	843