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 | 0.404 |
| 2024 | 0.395 |
| 2023 | 0.414 |
| 2022 | 0.337 |
| 2021 | 0.241 |
| 2020 | 0.223 |
| 2019 | 0.227 |
| 2018 | 0.224 |
| 2017 | 0.271 |
| 2016 | 0.224 |
| 2015 | 0.294 |
| 2014 | 0.652 |
54 countries carry a recent export concentration index figure. Each opens its own page with the history, the source and the API request.
149 of 207 indicators carry a figure for Sierra Leone, grouped by topic.