Year	Number
2008-01-01	1.9669
2009-01-01	2.2244
2010-01-01	2.1736
2011-01-01	2.1680
2012-01-01	2.2931
2013-01-01	2.4324
2014-01-01	2.3645
2015-01-01	2.8244
2016-01-01	2.8843
2017-01-01	2.9670