Year	Number
2004-01-01	540896
2005-01-01	662705
2006-01-01	750095
2007-01-01	936298
2008-01-01	1055003
2009-01-01	991995
2010-01-01	995340
2011-01-01	1097818
2012-01-01	985479
2013-01-01	1057905
2014-01-01	1138229
2015-01-01	1240523
2016-01-01	1400562
2017-01-01	1607386