Estimate of sameAs links?

All, 

Is there any estimate/study about the number of sameAs links between the various LOD datasets. I know some figures are available for the BTC datasets of 09 and 10, but anything related to the complete LOD? 

If there is, can someone please provide me pointers to it? 

Thanks

Prateek 

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Prateek Jain Research Assistant, Kno.e.sis Center Wright State University Fairborn,Ohio 45435 http://wiki.knoesis.org/index.php/Prateek