Overview
Whether mandating that content must be Open Access has an affect on deposits can be assessed by looking at the deposit counts of individual mandated institutions with more than 50 articles indexed in WoK in the period 2011-2013.
From Tableau:Content of institutional repositories
Content of institutional repositories by continent
From Tableau:Content of institutional repositories: Mandated vs non-Mandated
On Tableau: On Infogram: As an image: