Update README.md

README.md

 FrenchCropUsage is a thesaurus of crop organized by usage. 
 This thesaurus is dedicated to french agriculture point of view.
-The file called usageCulture20160531.rdf is the version of mai 2016. 
+
 The thesaurus is modelled using skos. It contains 307 skos:Concept individuals.
 
 The thesaurus was first used during the vespa project to index 
@@ -12,3 +12,6 @@ of the BSV corpora.
 More information are available on the web site
 http://ontology.irstea.fr/pmwiki.php/Site/FrenchCropUsage.
 
+The file called usageCulture20160531.rdf is the version of mai 2016. 
+The file called usageCulture20190826.rdf is the ongoing version. 
+