What is the average life expectancy of Afghanistan?

Afghanistan's life expectancy is low not necessarily because the people aren't living as long (though I'm sure that's a minor factor), but because infant mortality (early childhood death) is very high. (24.53 times higher than the U.S. rate in 2008 at 165 deaths per 1,000 born) This dramatically lowers the statistic. It would be like saying the average life expectancy in the U.S. is 50 years old when taking two individuals, 1 who dies at birth (age 0) and one who dies at 100 years.