Hello,
There are some leaks on the Sandbox stats but I have to warn you, these are not Sandbox current stats! They are actually a very outdated-raw stage of Sandbox that will never be introduced. I got my hands on the leakage itself will be posting it nevertheless so you can have an idea of what they -dev team- were initially aiming for.
Achtung: I have the habit of verifying things before posting and instead of just translating and found many discrepancies in comparison with the RU original poster, literally spent the whole night doing this for you.