Year	Number
2004-01-01	3104.5232
2005-01-01	3127.4356
2006-01-01	3226.8748
2007-01-01	3469.9847
2008-01-01	3580.9532
2009-01-01	3572.9393
2010-01-01	3562.8332
2011-01-01	3692.0039
2012-01-01	3771.7210
2013-01-01	3841.1491
2014-01-01	4083.1381
2015-01-01	4230.2052
2016-01-01	4238.0121
2017-01-01	4443.9020