MiL had cloth in 1976 with BiL and a door-to-door salesperson tried to sell them sposies, but FiL wouldn't hear of spending more money so they stayed cloth.

Early 80s either was normal, a bit like today, but by 1990 sposies were normal and cloth odd. I think we're back to cloth being more common - I would say just over half of the mums in the groups I attend go cloth.