Year	Number
2004-01-01	387762
2005-01-01	406468
2006-01-01	316356
2007-01-01	393635
2008-01-01	402475
2009-01-01	500630
2010-01-01	511566
2011-01-01	520266
2012-01-01	538764
2013-01-01	552979
2014-01-01	547673
2015-01-01	532788
2016-01-01	520680
2017-01-01	514389