Year	Number
2006-01-01	225572
2007-01-01	395475
2008-01-01	470073
2009-01-01	520324
2010-01-01	732453
2011-01-01	825917
2012-01-01	942324
2013-01-01	1010480
2014-01-01	1083717
2015-01-01	1300287
2016-01-01	1558080