The incidence of undernutrition is the percentage of the population that lacks access to enough food to meet dietary energy supply (DES) requirements (in Calories). Although the proportion of the world's population that is chronically undernourished is expected to decrease, as it has done over the last few decades, undernutrition is still widespread, particularly in certain regions. Furthermore, projections to the year 2010 suggest that little change in the absolute number of chronically undernourished people is likely unless determined, concerted action is taken.