@skukka SK and Japan may consume a lot of fast food but they don't do so the same way the USA does. The quiz maker didn't list any sources but I suspect they're measuring visits and not item quantity. Fast food is treated as a snack in those countries and not a meal.
Is the amount measured purely in how many tons they eat per year, or does it have something to do with population? Like most fast food per capita or somehting?