Year	Number
2004-01-01	170.0260
2005-01-01	174.9169
2006-01-01	177.3241
2007-01-01	170.7920
2008-01-01	215.9303
2009-01-01	261.0564
2010-01-01	296.5747
2011-01-01	281.9675
2012-01-01	275.3294
2013-01-01	353.1806
2014-01-01	367.5605