Year	Number
2004-01-01	9444210
2005-01-01	9349889
2006-01-01	11190350
2007-01-01	12830088
2008-01-01	13923737
2009-01-01	14865034
2010-01-01	14917099
2011-01-01	17414142
2012-01-01	16722801
2013-01-01	22558148
2014-01-01	9410649
2015-01-01	14265736
2016-01-01	11704885