* Quantities reflects the bulk weight of seizures, with no adjustment for purity or potency. Seizures reported by volume (litres, millilitres, etc.) are converted to kg equivalents by assuming a weight of 1 kg per litre. Seizures of amphetamine-type stimulants reported in tablets or similar units are converted using assumed bulk tablet weights between 90mg and 300 mg, depending on the region and specific drug type, and based on information currently available to UNODC. Further details on conversion factors are given in the methodology section accompanying the World Drug Report.