Year	Number
2004-01-01	229.6504
2005-01-01	274.2396
2006-01-01	357.0150
2007-01-01	217.8739
2008-01-01	218.3354
2009-01-01	228.4181
2010-01-01	287.8090
2011-01-01	356.9169
2012-01-01	285.6350
2013-01-01	312.7868
2014-01-01	321.0204
2015-01-01	341.9643