Year	Number
2004-01-01	147569
2005-01-01	150943
2006-01-01	153895
2007-01-01	157086
2008-01-01	160150
2009-01-01	164492
2010-01-01	169283
2011-01-01	176942
2012-01-01	184464
2013-01-01	188460
2014-01-01	191094
2015-01-01	188990
2016-01-01	179376