Low income – 31 Countries. Lower middle income – 51 Countries. Upper middle income – 53 Countries. High income: nonOECD – 48 Countries. Country Income Groups (World Bank Classification)
| Afghanistan | Low income |
|---|---|
| São Tomé and Principe | Lower middle income |
| Saudi Arabia | High income: nonOECD |
| Senegal | Lower middle income |
| Serbia | Upper middle income |
