Year	Number
2008-01-01	21.9067
2009-01-01	20.8081
2010-01-01	21.6537
2011-01-01	23.7016
2012-01-01	31.4245
2013-01-01	24.0832
2014-01-01	23.2843
2015-01-01	25.1145
2016-01-01	26.9322