The Art Newspaper recently published its yearly issue on exhibition stats. Among some of the interesting articles:
The 2012 attendance survey - led by a tour of paintings from the Mauritshuis to the Tokyo Metropolitan Art Museum
The massive boom of museum visitation and building in Brazil
And this fascinating opinion piece by Blake Gopnik on the ever-growing, and in his opinion, spirit-sapping, focus on blockbuster and temporary exhibitions, on which I have yet to make up my mind.