Year	Number
2004-01-01	8.8428
2005-01-01	8.5956
2006-01-01	8.6025
2007-01-01	8.4279
2008-01-01	7.9199
2009-01-01	7.3766
2010-01-01	7.1460
2011-01-01	6.9920
2012-01-01	5.9610
2013-01-01	5.3966
2014-01-01	4.9207
2015-01-01	4.0138
2016-01-01	2.9181