Year	Number
2004-01-01	66.4430
2005-01-01	68.1420
2006-01-01	70.7323
2007-01-01	61.5042
2008-01-01	64.2014
2009-01-01	65.7670
2010-01-01	65.8601
2011-01-01	63.9391
2012-01-01	61.0918
2013-01-01	58.0262
2014-01-01	53.3867
2015-01-01	35.4944
2016-01-01	29.6061
2017-01-01	30.2245