You're wrong to attribute $329 million to Benadir alone.
There are sources of government revenue that are country wide like passport and overflight fees.
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You're right, it is about 305 million. Petroleum and air navigation fees were the only clear sources of revenue collected nation-wide. I'm almost certain that all port fees are from Xamar Harbour and Aden Cadde Airport.
- Red for revenue generated solely within Benadir.
- Purple revenue generated nationwide.
- Blue(light) ambiguous revenue, but I believe almost all of it was generated within Benadir.