Year	Number
2004-01-01	516.8006
2005-01-01	544.2460
2006-01-01	569.0314
2007-01-01	586.7860
2008-01-01	577.7141
2009-01-01	707.8855
2010-01-01	810.1568
2011-01-01	826.1143
2012-01-01	814.0803
2013-01-01	929.7783
2014-01-01	1234.8512
2015-01-01	1490.6678
2016-01-01	1790.4649
2017-01-01	1843.4447