Year	Number
2004-01-01	0.2230
2005-01-01	1.5918
2006-01-01	1.0916
2007-01-01	1.5404
2008-01-01	0.9771
2009-01-01	0.2666
2010-01-01	0.0383
2011-01-01	0.0002
2012-01-01	0.0017