Year	Number
2004-01-01	142.5860
2005-01-01	154.3861
2006-01-01	163.1384
2007-01-01	176.9199
2008-01-01	187.1487
2009-01-01	191.9699
2010-01-01	194.6011
2011-01-01	191.1727
2012-01-01	184.9127
2013-01-01	180.4153
2014-01-01	176.8680
2015-01-01	173.4048
2016-01-01	168.7648
2017-01-01	167.9777