Year	Number
2006-01-01	11062800
2007-01-01	12626342
2008-01-01	13922064
2009-01-01	15325548
2010-01-01	17220456
2011-01-01	19397887
2012-01-01	21743589
2013-01-01	24378220
2014-01-01	27222833
2015-01-01	30073188
2016-01-01	32720932