Year	Number
2004-01-01	3.5890
2005-01-01	3.4949
2006-01-01	3.6316
2007-01-01	3.5023
2008-01-01	4.6124
2009-01-01	5.8509
2010-01-01	5.9236
2011-01-01	5.1483
2012-01-01	5.2489
2013-01-01	5.1066
2014-01-01	5.9775