Year	Number
2004-01-01	9407082
2005-01-01	9308131
2006-01-01	10993738
2007-01-01	12636434
2008-01-01	13725641
2009-01-01	14596791
2010-01-01	14641562
2011-01-01	16993727
2012-01-01	16420685
2013-01-01	22253040
2014-01-01	9240264
2015-01-01	13946089
2016-01-01	11516641