There are more of them than we want to admit.
According to UN documents I read from years back, 15% of Bosaso residents are Jareerweyn alone. Today I reckon they're floating at 20%. If Bosaso is at 15% imagine what their numbers are like in their traditional areas. In places like Jamaame, 129,000 population, they are the clear majority. I'm sure they are majority in Afgooye district as well, and Jowhar, possibly even the wider district of Beledweyn. Most crucial farming communities are dominated by Jareerweyn. Bay and Bakool as well. Even riverside towns in Gedo have a Jareerweyn presence. They play a massive role in the labor and farming economy throughout Somalia.
I remember going through Shalaambood & Janaale to Marka when I was young, it was exclusively them.
And so were most of the farm laborers in Af-gooye, nobody ever hired a person who wasn't Jareer. Even their women farmed from sunrise to sunset planting tomatos for a measly salary. Jamaame too.
Weird enough though or at least from what I can recall, not that many commercial farms in or around Jilib. Jamaame had a better climate. Jilib is just a fucked place; rainy, foggy, mosquitos, frogs, snakes and every other bug you can imagine. We stayed there briefly when I was around 10, something to do with my father & the Faanoole damp. My mother couldn't wait to leave. The sun set at 4PM and it was cold as hell, never stopped raining. As for the Bantus, they lived on the other side of the river bank. Their side was called "Kun yaasiin..." and no skinny ventured off there. They used to kill them back in the day.