This claim was from WAPO https://www.washingtonpost.com/opinions/singapore-is-winning... written by the Singapore ambassador.

But I believe he claims rightly, since the statistics match for Singapore's population and drug abusers. Please note that Singapore also considers cannabis as drug abuse.

Report: https://www.cnb.gov.sg/docs/default-source/drug-situation-re...

Singapore has a reputation to uphold so unlike US numbers that tend to be high, i assume Singapore is taking the low end.

Not to say opioid abuse is less, but its way more than youd think considering the governments stance.