Year	Number
2004-01-01	165.4945
2005-01-01	188.1623
2006-01-01	220.8638
2007-01-01	253.3561
2008-01-01	282.3929
2009-01-01	292.9157
2010-01-01	300.8543
2011-01-01	322.6528
2012-01-01	344.4587
2013-01-01	341.1366
2014-01-01	353.2440
2015-01-01	377.9389
2016-01-01	393.1963
2017-01-01	398.1213