Year	Number
2004-01-01	5.6001
2005-01-01	7.4228
2006-01-01	9.8913
2007-01-01	11.7952
2008-01-01	14.1457
2009-01-01	15.7869
2010-01-01	17.4617
2011-01-01	20.1986
2012-01-01	23.0816
2013-01-01	27.3032
2014-01-01	30.4717
2015-01-01	33.4431
2016-01-01	37.2440