| Code | Description |
| HIC | World Bank high-income economies (Gross national income (GNI) per capita of US$12 696 or more in 2020) |
| UMC | World Bank upper-middle-income economies (GNI per capita of US$4096–US$12 695 in 2020) |
| LMC | World Bank lower-middle-income economies (GNI per capita of US$1046–US$4095 in 2020) |
| LIC | World Bank low-income economies (GNI per capita of US$1045 or less in 2020) |
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