Year	Number
2004-01-01	491964
2005-01-01	532205
2006-01-01	573548
2007-01-01	561373
2008-01-01	461092
2009-01-01	443594
2010-01-01	447556
2011-01-01	461476
2012-01-01	485154
2013-01-01	504113
2014-01-01	516074
2015-01-01	553881
2016-01-01	589736
2017-01-01	647282