Worldwide, an estimated 57 million people died in 2002. But whether they lived in a high-income country or a low-income one, cardiovascular disease was the leading cause of death. The World Health Organization reported that in high-income countries more than two-thirds of all people live beyond the age of 70 and die from chronic diseases. This drops to half of all people in middle-income countries and less than a quarter of people in low-income countries. But while cancer, diabetes and neurodegenerative diseases round out the causes of death in the wealthiest countries, HIV/AIDS, complications from pregnancy and childbirth, and road accidents are leading causes of death for people in middle-income countries. Infectious diseases, diarrheal disease and malaria are among the biggest killers in low-income countries. Nearly 11 million deaths in 2002 were among children under five years of age and 98 percent of them were in low-and middle-income countries.