Year	Number
2006-01-01	38.2746
2007-01-01	37.7805
2008-01-01	37.3827
2009-01-01	37.1500
2010-01-01	36.8312
2011-01-01	36.4642
2012-01-01	35.7163
2013-01-01	36.3269
2014-01-01	35.8429
2015-01-01	33.7451
2016-01-01	31.7047
2017-01-01	32.5969