Year	Number
2004-01-01	0.4710
2005-01-01	0.5265
2006-01-01	0.6096
2007-01-01	0.7481
2008-01-01	0.9698
2009-01-01	1.2053
2010-01-01	1.3023
2011-01-01	1.3716
2012-01-01	1.4131