Year	Number
2004-01-01	3.1621
2005-01-01	3.4585
2006-01-01	4.1502
2007-01-01	5.0395
2008-01-01	6.2253
2009-01-01	6.7194
2010-01-01	8.4980
2011-01-01	8.4980
2012-01-01	8.3992
2013-01-01	9.0909
2014-01-01	9.1897
2015-01-01	9.5850
2016-01-01	8.8933