Year	Number
2008-01-01	19.7917
2009-01-01	25.0000
2010-01-01	30.2083
2011-01-01	31.2500
2012-01-01	35.4167
2013-01-01	36.4583
2014-01-01	35.4167
2015-01-01	35.4167
2016-01-01	30.2083
2017-01-01	30.2083