Ebola incidence rate

If you were going to compare the Ebola incidence rate in Sudan in 1976 to that of Liberia in 2014, which rate would be better to use (crude or adjusted) and why?

 

In 2013 one year in one state, there were:

272 deaths among 0-24-year-olds

612 deaths among 25-54-year-olds

5,204 deaths among those aged 55 years and older

On July 1st of that year, there were:

34,000 people aged 0-24 years old

834,000 people aged 25-54 years old

74,000 people aged 55 years and older

The relevant US Standard population was

97,039,882 people aged 0-24 years old

118,922,774 people aged 25-54 years old

58,670,986 people aged 55 years and older