Year	Number
2008-01-01	36.7491
2009-01-01	88.1264
2010-01-01	106.5102
2011-01-01	140.3944
2012-01-01	167.5158
2013-01-01	157.3860
2014-01-01	174.9035
2015-01-01	183.5727
2016-01-01	184.5995
2017-01-01	174.5789