UNCTAD Herfindahl-Hirschmann index of how concentrated exports are in a few products (lower is less concentrated). Source: UNCTAD. Retrieved 19 Aug 2026.
| Period | Export Concentration Index |
|---|---|
| 2025 | 0.496 |
| 2024 | 0.418 |
| 2023 | 0.402 |
| 2022 | 0.453 |
| 2021 | 0.425 |
| 2020 | 0.335 |
| 2019 | 0.478 |
| 2018 | 0.964 |
| 2017 | 0.624 |
| 2016 | 0.648 |
| 2015 | 0.669 |
| 2014 | 0.569 |
54 countries carry a recent export concentration index figure. Each opens its own page with the history, the source and the API request.
140 of 207 indicators carry a figure for Sao Tome and Principe, grouped by topic.