The absolute poverty measure trends noted above are supported by human development indicators, which have also been improving. Life expectancy has greatly increased in the developing world since World War II and is starting to close the gap to the developed world. [ citation needed ] Child mortality has decreased in every developing region of the world.  The proportion of the world's population living in countries where per-capita food supplies are less than 2,200 calories (9,200 kilojoules ) per day decreased from 56% in the mid-1960s to below 10% by the 1990s. Similar trends can be observed for literacy, access to clean water and electricity and basic consumer items.