Year	Number
2004-01-01	7.6619
2005-01-01	7.7512
2006-01-01	7.8928
2007-01-01	8.1461
2008-01-01	8.4936
2009-01-01	8.5738
2010-01-01	8.6113
2011-01-01	8.7892
2012-01-01	9.0353
2013-01-01	9.3608
2014-01-01	9.6386
2015-01-01	10.0178
2016-01-01	10.3574