Year	Number
2006-01-01	326
2007-01-01	349
2008-01-01	425
2009-01-01	443
2010-01-01	453
2011-01-01	429
2012-01-01	436
2013-01-01	437
2014-01-01	438
2015-01-01	437
2016-01-01	442