| > 10 | |
| 1 - 10 | |
| 0.1 - 1 | |
| 0.01 - 0.1 | |
| < 0.01 | |
| No data |
The consumption statistics are displayed in milligrams per capita, which is calculated by dividing the total amount of opioid consumed in kilograms by the population of the country for that particular year (cite United Nations population data). This provides a population-based statistic that allows for comparisons between countries.