Year	Number
2009-01-01	23.6276
2010-01-01	23.9882
2011-01-01	20.5790
2012-01-01	21.2966
2013-01-01	20.8270
2014-01-01	20.6745
2015-01-01	21.7669
2016-01-01	22.9318
2017-01-01	24.1367