Thanks for checking with us and sorry for the delayed response. Following is the response of your query.
Our Total Natural Resources Rent Data is the sum of the resource rents from the following commodities: Energy (oil, natural gas, hard coal, and soft coal), Metals and Minerals (tin, gold, lead, zinc, iron, copper, nickel, silver, bauxite, and phosphate), and Forests.
So if our accounts do not cover the prominent natural resources of a particular country (e.g., fishing for Namibia), then our rent estimates would be an underestimate.
We hope this helps.
Regards