Year	Number
2004-01-01	10750
2005-01-01	25598
2006-01-01	59203
2007-01-01	118907
2008-01-01	146261
2009-01-01	138428
2010-01-01	41636
2011-01-01	66901
2012-01-01	115928
2013-01-01	125407
2014-01-01	143220
2015-01-01	175745
2016-01-01	202088
2017-01-01	276421