Year	Number
2004-01-01	207.9027
2005-01-01	242.4176
2006-01-01	294.0720
2007-01-01	347.7883
2008-01-01	392.5963
2009-01-01	409.5135
2010-01-01	427.0870
2011-01-01	464.6636
2012-01-01	500.2462
2013-01-01	454.3656
2014-01-01	468.6248
2015-01-01	537.7781
2016-01-01	549.6239
2017-01-01	564.6345