That's based on diet intake surveys, it's based on levels of obesity, it's based on a range of factors that gives you an approximate guess as to how much food is actually going into people's mouths.
Tuginesin toitumisuuringutele, ülekaaluliste hulgale ja paljudele teistele faktoritele, mis annavad kaudselt aimu, kui palju inimesed päriselt söövad.