Year	Number
2004-01-01	4262.0737
2005-01-01	3981.5689
2006-01-01	4087.6262
2007-01-01	4092.1098
2008-01-01	4214.5702
2009-01-01	4284.9001
2010-01-01	4412.7172
2011-01-01	4603.9739
2012-01-01	4787.3546
2013-01-01	5144.2907
2014-01-01	5302.6086
2015-01-01	5132.6547
2016-01-01	5212.4935