So, TEA/AECOM has published the "Theme Index: The Global Attractions Attendance Report" for 2012.
A short extract:
On place 1 it's the Magic Kingdom in WDW 17,536,000 visitors in 2012, up 2,3%
On place 5 Disneyland Park at DLP with 11,200,000 visitors in 2012, up 1.9%
On place 20 Walt Disney Studios at DLP with 4,800,000 visitors in 2012, also up 1.9%
And in the same report we see that Walt Disney had a total of 126,479,000 visitors at all their parks in 2012. Up 4,7%.
For place two, Merlin Entertainment Group had 54,000,000 visitors, up 16.4%.
The full report: //http://www.aecom.com/deployedfiles/Internet/Capabilities/Economics/_documents/2012%20Theme%20Index%20Combined_1-1_online.pdf
Good to see WDS coming in at number 20, hopefully when Ratatouille opens next year the park will be in the top 15.