Year	Number
2004-01-01	31094550.0
2005-01-01	36082889.0
2006-01-01	40940189.0
2007-01-01	41009121.0
2008-01-01	43939155.0
2009-01-01	45028235.0
2010-01-01	47109475.0
2011-01-01	47876899.0
2012-01-01	46910388.0
2013-01-01	47826297.0
2014-01-01	48410188.0
2015-01-01	50411828.2
2016-01-01	53599165.0