Year	Number
2009-01-01	23.4940
2010-01-01	23.5864
2011-01-01	23.1827
2012-01-01	22.8446
2013-01-01	22.3715
2014-01-01	21.8284
2015-01-01	21.3203
2016-01-01	21.8768