Year	Number
2007-01-01	37212667
2008-01-01	38934153
2009-01-01	41477286
2010-01-01	43840339
2011-01-01	46839259
2012-01-01	52766254
2013-01-01	56357510
2014-01-01	58168486
2015-01-01	62313847
2016-01-01	67308243