Year	Number
2005-01-01	465640
2006-01-01	814415
2007-01-01	1117107
2008-01-01	1598135
2009-01-01	1985091
2010-01-01	2406047
2011-01-01	2754298
2012-01-01	3244207
2013-01-01	3855009
2014-01-01	4509601