The import issues in some countries , particularly he US, would mean an older average age of cars. The import taxes etc in some countries also limits the numbers of cars, especially new. This will put a bias on the age profile of cars.
You are absolutely right, here in Singapore we have 6 MOG over 35 yrs old, because import a new one is just crazy, and far as we know have a also a lot in Malaysia and Indonesia for the same reasons.
And soon will have one more, as i just buy a lovely 71"