Year	Number
2005-01-01	2307
2006-01-01	2641
2007-01-01	2995
2008-01-01	3342
2009-01-01	3601
2010-01-01	3794
2011-01-01	3975
2012-01-01	4083
2013-01-01	4123
2014-01-01	4222
2015-01-01	4418
2016-01-01	4551