Merca only has 4 'degmo'. Each degmo is equivalent to what others consider a medium sized town.
I always wondered why certain towns gained a huge population when they weren't historically settled.
Balcad, Mahadaay, Ceelbuur, Baardheere, Luuq, Buulo Burde, Jamaame etc use to be some of the biggest towns in Somalia with centuries-old structures and public services but today they are outdone by Cadaado, Gaalkacyo, Beledxaawo etc. Even Afgooye once considered a suburban holiday resort for reer Muqdisho is bigger than the aforementioned.
In the north it is the same. Towns that were famous historically didn't grew much people just moved into the big cities (Hargeisa, Burco etc). Were's in the south a lot of growth was seen in numerous new towns/cities which were once villages.