Prevalence rates
exhibited substantial variation across age, sex, and countries, with rates below 5 percent for women in some African countries to more than 50 percent for men in countries such as Indonesia, Armenia, Laos, Papua New Guinea and Russia.
It also doesn't
exhibit variation of calibration error with age, but such
variation shouldn't have a significant impact unless, over the range where the likelihood function for the sample is significant, it is
substantial in relation to 14C determination error.