A new United Nations study claims most countries aren't prepared to support the growing number of elderly people.
The World Population Ageing 2009 report, recently published by the Department of Economic and Social Affairs (DESA), found that by 2050 those older than 60 will outnumber children younger than 15.
The U.N. said nations aren't ready for that shift.
Wealthy countries are the most prepared for the rise in elderly -- Sweden the most, Afghanistan the least.
The U.N. report rates America as the eighth most prepared country.