You don't have to trust me, you can simply run the numbers yourself. Going by the population growth rate of 2005-2014, Isaaq are under 50% of the population in 2029. All I'm doing is simply projecting trends forward.
Demographic transitions Are irreversible. It is probably impossible for a population that has fallen under 5 children per woman to ever again achieve a TFR of 7.5 or 8. The only direction is downwards once you begin the transition.
The Isaaq and Gadabursi began the transition earlier than the rest of Somalia. Already in 2006 their fertility was declining, while as of 2020 Dhulbahante and Warsangeli have not even began to lower their fertility.
That's why no body takes you seriously you shifted the argument to Northwest (Somaliland) vs Northeast (Puntland) when we're talking about Isaaq vs Harti growth rates within Somaliland (Northwest)
There is no difference between 5.9 and 6.2 but that's your way to wiggle out of your own fallacy. The discussion was about Isaaq & Harti regions. You said Hargiesa have low fertility rates at about 5% and Sool/Sanaag have about 8% growth rate.
Here is the problem. Your theory assumes the other half of Isaaq don't also have similar growth rates, half of Sanaag is inhabitated by Isaaq so they cancel the Harti out in the region. Burco district has 6% growth rate which is close to Sool region and a much higher base population.
Can Sool with a slightly higher growth rate differential of 2% outnumber the much higher base population of Burco district? Yes but it would take approximately 25 years.
That would mean for the 300k Harti in Sool region (actually 270k when you subtract Caynaba but for sake of argument we'll count it for Harti) to catch up with Burco district it means you will have to wait 25 years.
I'm not even talking about Oodweyn, Shiekh, Berbera, Gabiely or the 1 million inhabitants of Hargeisa district.
Considering all variables remain unchanged, it will take Harti in Somaliland 25 years (cirka 2040) to catch up with the population of Burco district.
See how I shifted the discussion to a comparison between Burco district and Sool region. By your own methodology your theory flopped. Let's see how you'll talk your way out of this one.