Year	Number
2004-01-01	219866
2005-01-01	252860
2006-01-01	327472
2007-01-01	412899
2008-01-01	500844
2009-01-01	451928
2010-01-01	501414
2011-01-01	540087
2012-01-01	609132
2013-01-01	626331
2014-01-01	650614
2015-01-01	673754
2016-01-01	691408