Before ORT was used often, most of the children who died in developing nations, died from diarrhea. Between 1980 and 2006, the introduction of ORT is thought to have lowered the number of young children who died anywhere in the world from 5 to 3 million every year. However, in 2008, diarrhea is still the second most common cause of death in children under five years (17 percent), (after pneumonia (19 percent)). Moreover, by the same year, the use of ORT in children under five had declined.