Year	Number
2007-01-01	21772654.4973
2008-01-01	22466377.0725
2009-01-01	22385649.4738
2010-01-01	22710206.6546
2011-01-01	22833495.0000
2012-01-01	20267847.1041
2013-01-01	20809606.0000
2014-01-01	21032221.0000
2015-01-01	21182066.0000
2016-01-01	19409240.0000
2017-01-01	18482515.0000