Year	Number
2004-01-01	3.4919
2005-01-01	3.4079
2006-01-01	3.4070
2007-01-01	3.3854
2008-01-01	3.4406
2009-01-01	3.5271
2010-01-01	3.4651
2011-01-01	3.4961
2012-01-01	3.8783