Where is my data ?

In the digital age, "my data" is increasingly becoming "my self". The diagram on the left (attribution) shows the datasets that have been published in Linked Data format, "a recommended best practice for exposing, sharing, and connecting pieces of data, information, and knowledge on the Semantic Web using URIs and RDF" (Wikipedia). Among others, they include  a lot of media, government and user-generated content but, despite the apparent complexity, they form  arguably a very small percentage of the archives and databases that are NOT exposable, shareable and connectable.