Year	Number
2004-01-01	171423
2005-01-01	176907
2006-01-01	185031
2007-01-01	189918
2008-01-01	192928
2009-01-01	202649
2010-01-01	207522
2011-01-01	215981
2012-01-01	223781
2013-01-01	224865
2014-01-01	227983
2015-01-01	226903
2016-01-01	218662