Year	Number
2004-01-01	138.0000
2005-01-01	149.9289
2006-01-01	158.6531
2007-01-01	172.4609
2008-01-01	182.9261
2009-01-01	187.9354
2010-01-01	191.0484
2011-01-01	187.7716
2012-01-01	181.2643
2013-01-01	176.2336
2014-01-01	172.1849
2015-01-01	168.4733
2016-01-01	163.8448
2017-01-01	163.0806