Year	Number
2004-01-01	424.0587
2005-01-01	426.7052
2006-01-01	440.7702
2007-01-01	434.7953
2008-01-01	445.4819
2009-01-01	493.3423
2010-01-01	508.0528
2011-01-01	537.1348
2012-01-01	546.0063
2013-01-01	557.7843
2014-01-01	565.9679
2015-01-01	440.0035
2016-01-01	405.9295