Year	Number
2009-01-01	23.4556
2010-01-01	21.7181
2011-01-01	23.7452
2012-01-01	23.2143
2013-01-01	25.0000
2014-01-01	25.1931
2015-01-01	25.0483
2016-01-01	21.0425