sentences:  In the first decade of the 20th century, French administrators in southern Tuareg areas of the French Sudan estimated that "free" to "servile" groups within Tuareg society existed at ratios of 1 to 8 or 9.At the same time, the servile ""rimaibe"" population of the Masina Fulbe, roughly equivalent to the "Bella", constituted between 70% to 80% of the Fulbe population, while servile Songhay groups around Gao made up some 2/3 to 3/4 of the total Songhay population.Klein concludes that approximately 50% of the population of French Soudan at the beginning of the 20th century was in some servile or slave relationship.