Year	Number
2004-01-01	7.9491
2005-01-01	13.3269
2006-01-01	21.1095
2007-01-01	52.7534
2008-01-01	236.4654
2009-01-01	253.5177
2010-01-01	266.9895
2011-01-01	281.5970
2012-01-01	287.0004
2013-01-01	296.3848
2014-01-01	308.1779
2015-01-01	318.7065
2016-01-01	316.5577