License declaration in vocabularies

Linked Open Vocabularies (LOV) collects curated vocabularies in RDF and exposes them with an API and SPARQL endpoint.
As of today, 469 vocabularies are in the database. The raw file can be downloaded with the metadata (a TTL file) or a big dump with all the vocabularies contained (as a handy .nquads file).

163 of them had some kind of rights declaration (using one of the vocabularies for declaring rights information), against 306 vocabularies with no trace of rights information.
136 of the licensed datasets at least referred to one URL. The character of the referred license is as follows:

There is a large increase in the use of licenses in vocabularies and ontologies compared with the same analysis, carried out in September 2013!