Year	Number
2006-01-01	118.2663
2007-01-01	129.7176
2008-01-01	155.6488
2009-01-01	170.5613
2010-01-01	154.8916
2011-01-01	152.0026
2012-01-01	156.0650
2013-01-01	158.4921
2014-01-01	157.2937
2015-01-01	149.4539
2016-01-01	139.2083
2017-01-01	138.0913