Year	Number
2007-01-01	10.9981
2008-01-01	11.7197
2009-01-01	11.8354
2010-01-01	12.1083
2011-01-01	12.9490
2012-01-01	13.0800
2013-01-01	13.1550
2014-01-01	13.2089
2015-01-01	13.8530
2016-01-01	13.9185
2017-01-01	13.2198