Year	Number
2004-01-01	40.0047
2005-01-01	41.6586
2006-01-01	46.1218
2007-01-01	53.0962
2008-01-01	57.2740
2009-01-01	54.3653
2010-01-01	54.7062
2011-01-01	65.8291
2012-01-01	68.4156
2013-01-01	70.9748
2014-01-01	71.6071
2015-01-01	70.5616
2016-01-01	70.3664