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.
Det är baserat på undersökningar av kostvanor, andelen överviktiga och en rad andra faktorer som ger oss en ungefärlig gissning på hur mycket mat som faktiskt passerar in i människors munnar.