Year	Number
2004-01-01	139.5540
2005-01-01	146.4312
2006-01-01	154.7010
2007-01-01	155.2583
2008-01-01	157.8209
2009-01-01	154.2996
2010-01-01	168.6564
2011-01-01	170.4668
2012-01-01	164.6763
2013-01-01	161.1614
2014-01-01	165.2355
2015-01-01	163.9740
2016-01-01	168.0283