You can substitute the buuhoodle population with Caynaba, so their population inside Somaliland is still around 8-9% which is a small to medium sized clan equivalent to Arab.
If you look at the Arab neighbourhood of Hargeisa (stadium area) you will see it has a larger population than all Dhulbahante in Sool.
In terms of population Somaliland has a tiered system:
Large clans: Habar Jeclo, Garxajis, Habar Awal
Medium to large clans: Gadabursi, Arab
Medium to small clans: Dhulbahante
Small clans: Toljecle, Ayoub, Ciise, Warsangeli
Tiny clans: Madhibaan, Gahayle, Ugaaslabe, Magaadle, Akisho