Number of undernourished/starving people worldwide 2000-2018

The acronym FAO stands for Food and Agriculture Organization of the United Nations.
Underourishment is defined as the status of persons, whose food intake regularly provides less than their minimum energy requirements. The average minimum energy requirement per person is about 1800 kcal per day. The exact requirement is determined by a person’s age, body size, activity level and physiological conditions such as illness, infection, pregnancy and lactation.
Data for Food security indicators can be accessed here.