Year	Number
2008-01-01	1771452
2009-01-01	2007529
2010-01-01	2721015
2011-01-01	3559110
2012-01-01	4509445
2013-01-01	4866607
2014-01-01	4744892
2015-01-01	4764402
2016-01-01	5545127
2017-01-01	5908164