International Narcotics Control Strategy Report, Volume I: Drug and Chemical Control [open pdf - 2MB]
"The Department of State's International Narcotics Control Strategy Report (INCSR) [for 2017] […] covers the year January 1 to December 31, 2016 […] [T]he INCSR provides the factual basis for the designations contained in the President's report to Congress on the major drug-transit or major illicit drug producing countries […] The President is also required in that report to identify any country on the majors list that has 'failed demonstrably . . . to make substantial efforts' during the previous 12 months to adhere to international counternarcotics agreements and to take certain counternarcotics measures set forth in U.S. law. U.S. assistance under the current foreign operations appropriations act may not be provided to any country designated as having 'failed demonstrably' unless the President determines that the provision of such assistance is vital to U.S. national interests or that the country, at any time after the President's initial report to Congress, has made 'substantial efforts' to comply with the counternarcotics conditions in the legislation. […] The 2017 INCSR covers countries that range from major drug producing and drug transit countries, where drug control is a critical element of national policy, to small countries or entities where drug issues or the capacity to deal with them are minimal. The reports vary in the extent of their coverage. For key drug-control countries, where considerable information is available, we have provided comprehensive reports. For some smaller countries or entities where only limited information is available, we have included whatever data the responsible post could provide."
INCSR 2017 Volume 1
U.S. Department of State: https://www.state.gov/