For example - we need the population by single year of age from 12 years to 40 years for cities such as New Orleans, Atlanta, Indianapolis, San Diego, Minneapolis, Chicago, for the years 1975 to 2005.
Although we would love to have population by single year of age e.g. 12 yo, 13 yo, we could use data by age group if that is all that is available e.g. 12-14 or 12 to 15, 16 to 20, etc. Would need to know the county boundaries of the city population to be sure that it aligns with FBI data boundaries.