Year	Number
2004-01-01	160.7633
2005-01-01	192.3673
2006-01-01	212.4917
2007-01-01	259.1356
2008-01-01	285.5335
2009-01-01	262.7232
2010-01-01	258.1014
2011-01-01	278.8562
2012-01-01	245.2631
2013-01-01	258.0881
2014-01-01	272.4158
2015-01-01	291.5215
2016-01-01	323.0627
2017-01-01	370.7700