There is some nuance here. We can talk about all of their net flows as if they're denominated in a given currency, but this article is specifically talking about their reserves of a particular currency, and oil is a very large reason for the continued depletion of their dollar reserves, independent of their overall account balance when all of it is converted to dollars. I don't have a good knowledge of what their other currency reserves are, or the feasibility/implications of converting such massive dollar figures between currencies. If you want to provide some more details about the particular figure you mentioned, we might be able to discuss it more meaningfully.