Year	Number
2004-01-01	6636
2005-01-01	7220
2006-01-01	8327
2007-01-01	11645
2008-01-01	13030
2009-01-01	14989
2010-01-01	21363
2011-01-01	24936
2012-01-01	29646
2013-01-01	26081
2014-01-01	29487
2015-01-01	32659
2016-01-01	66847
2017-01-01	23437