Year	Number
2004-01-01	136700
2005-01-01	158091
2006-01-01	182993
2007-01-01	305264
2008-01-01	335570
2009-01-01	352969
2010-01-01	386546
2011-01-01	410511
2012-01-01	418348
2013-01-01	452961
2014-01-01	487647
2015-01-01	502132
2016-01-01	525350
2017-01-01	554219