Conversely they could represent a mistake and/or bad data. How they would get accurate data on drug addiction in 1880 is itself a cause for speculation.
For China, we have good records because the British KEPT very good records of Opium shipments.
Wrong - the DEA's numbers showing low and declining opium addiction when it was legal constitute a 'statement against interest' and thus have credibility, unlike their self-serving misconclusions.
Conversely they could represent a mistake and/or bad data. How they would get accurate data on drug addiction in 1880 is itself a cause for speculation.
For China, we have good records because the British KEPT very good records of Opium shipments.