Year	Number
2004-01-01	10706
2005-01-01	25502
2006-01-01	58753
2007-01-01	117393
2008-01-01	144429
2009-01-01	137703
2010-01-01	41491
2011-01-01	66542
2012-01-01	115483
2013-01-01	124975
2014-01-01	142626
2015-01-01	174501
2016-01-01	200182
2017-01-01	272836