Year	Number
2004-01-01	856.3595
2005-01-01	918.6929
2006-01-01	1114.9939
2007-01-01	1250.0169
2008-01-01	1321.6719
2009-01-01	1222.0147
2010-01-01	1237.8519
2011-01-01	1376.0890
2012-01-01	1540.1444
2013-01-01	1687.4285
2014-01-01	1808.6173
2015-01-01	1857.0372
2016-01-01	3347.6387
2017-01-01	3594.4276