Nobody except maybe tourists drinks Fosters in Australia. I'd consider a 3.2% beer a mid strength and a horrible waste of money. Most beer sold here is between 4.5 and 5.5%, unless you're in a stadium and they'll offer a variety of light beers and mid strengths at 9 or ten bucks for 400ml at bars while they sell cans of full strength bourbon and coke or rum and coke next to them at 14 bucks a can. Work that out.
Please keep in mind that when you say 3.2% you are actually talking about a 4%abv beer. 3.2% is in alcohol by weight, which is not typically used in the beer industry, just how the laws were written after the end of prohibition. Since ABW gives a lower number it wasn't as scary for those who wanted to keep prohibition.
That's kind of what I was saying. Although I'd bet Corona is more popular in Mexico than Foster's is in the AU. I just doubt it is far and away the most popular beer in Mexico.