Year	Number
2004-01-01	1.5453
2005-01-01	1.6820
2006-01-01	2.0445
2007-01-01	2.5039
2008-01-01	3.1188
2009-01-01	3.7336
2010-01-01	4.3023
2011-01-01	5.1016
2012-01-01	6.3766
2013-01-01	6.9516
2014-01-01	9.5516
2015-01-01	21.0750
2016-01-01	19.4969
2017-01-01	19.4469