Year	Number
2004-01-01	306.1304
2005-01-01	287.3750
2006-01-01	263.8694
2007-01-01	261.5803
2008-01-01	307.5698
2009-01-01	301.7121
2010-01-01	294.4179
2011-01-01	287.3291
2012-01-01	303.3545
2013-01-01	250.7087
2014-01-01	452.0774
2015-01-01	484.8027
2016-01-01	509.8353