Road degradation grows to the power of 4 with the weight of the vehicle: a car that weights 2 as much as another degrades the roads 16 times more. That seems to me like a good rule to guide vehicle taxing.

I’m afraid I don’t have a reliable source of information other than what I can see on the street. Anecdotally it is hard to find pescatarian or vegetarian dishes in many restaurants. If nearly 20% of the population was vegetarian, this wouldn’t be the case.

That Wikipedia page is odd: in the table of shows Mexico as 19%, and in the Mexican section (below the table) it has 8%, and groups Mexico with Central America.

As a Mexican, even 8% feels high! It is damn hard to find meat free food in most restaurants.