Year	Number
2005-01-01	218
2006-01-01	259
2007-01-01	272
2008-01-01	392
2009-01-01	439
2010-01-01	459
2011-01-01	468
2012-01-01	437
2013-01-01	457
2014-01-01	446
2015-01-01	432
2016-01-01	432
2017-01-01	350