Year	Number
2004-01-01	5.596770737
2005-01-01	5.868094354
2006-01-01	6.565729787
2007-01-01	6.589351422
2008-01-01	7.304474237
2009-01-01	7.402513983
2010-01-01	7.861777691
2011-01-01	8.863261011
2012-01-01	9.594959621
2013-01-01	9.432952843
2014-01-01	9.281562359