200 languages drawn from three samples: a 113-language sample of L. Stassen, a 40-language sample of R. Perkins & J. Bybee, and a 50-language sample compiled by G. Gilligan
Stassen’s sample: 87% of postpositional languages with aspect affixes are suffixing, 13% are prefixing; Gilligan’s sample: 81% of postpositional languages with aspect affixes are suffixing, 19% are prefixing.