Year	Number
2004-01-01	3.0416
2005-01-01	4.9542
2006-01-01	7.6947
2007-01-01	14.4803
2008-01-01	23.1136
2009-01-01	30.2396
2010-01-01	34.0473
2011-01-01	43.5493
2012-01-01	50.4078
2013-01-01	53.9218
2014-01-01	59.4357
2015-01-01	60.5622
2016-01-01	61.1394