Year	Number
2004-01-01	2.0042
2005-01-01	5.4819
2006-01-01	13.0467
2007-01-01	25.2008
2008-01-01	40.5031
2009-01-01	41.9127
2010-01-01	46.6039
2011-01-01	49.4104
2012-01-01	61.7881
2013-01-01	66.9682
2014-01-01	70.7164
2015-01-01	70.0648
2016-01-01	74.3057