Year	Number
2004-01-01	2.8351
2005-01-01	3.7251
2006-01-01	3.8296
2007-01-01	4.8355
2008-01-01	5.6502
2009-01-01	6.5149
2010-01-01	7.1878
2011-01-01	7.9114
2012-01-01	8.9777
2013-01-01	10.5915
2014-01-01	10.9822
2015-01-01	12.7203