Year	Number
2006-01-01	226792
2007-01-01	397718
2008-01-01	471930
2009-01-01	599329
2010-01-01	1243263
2011-01-01	1474082
2012-01-01	1746502
2013-01-01	1795037
2014-01-01	1817044
2015-01-01	2321804
2016-01-01	2743433