Under-representation of Pashtun population

I have been reading alot about demographics of Afghanistan, and i see a trend:

Pashtun population which before invasion of Russia was considered to be as high as 70%, was manipulated to underscore pashtuns, as they were the primary resistance towards russain invasion.

Then came the likes of Burhanuddine Rabbani and Ahmad Shah Massod, who naturally continued the practice.

After which came the Americans. The credibility of CIA fact book is also questionable as before the invasion they were showing pashtun population above 50% and than during invasion it even went down to 38% before going back to 42% over the years??!!!  Plus whats interesting to note is that even today CIA fact book shows Pashtun as 8% of the population of Pakistan, while Pakistan's own census 1998 (not estimation) shows Pashtuns more than 15.4% and as per Census 2017 they are well exceeding 18%. 18% includes pashtuns that speak pashto, that number can reach 25% if Pashtuns such as Hazarawal Pathans, Punjabi Pathans, Kashmiri Pathans etc etc are included. Something worth mentioning is that during the same time Tajik Population was inflated from 15% to even 37%!! in few cases. 

The Pashtun Areas in the Northern Afghanistan consists of rivers, where they were resettled by King Abdul Rehman and these areas, obviously, have larger population densities.

General practice of counting anyone and everyone who cannot speak pashto, which may even include Pashtuns, as Tajiks has been encouraged.

Historically, Herat has been called a Tajik city surrounded by Pashtuns, with significant Aimak and Farsiwan minority. Similarly, there has been no conclusive evidence of settling of Tajiks in Badghis or north western Afghanistan, but continuously other ethnic groups primarily, Aimaks, Kazalbash, Farsiwans, Arabs etc. have been counted as Tajiks, thereby bundling them all togather as Tajiks and propping up Tajik population. Also remember Iraq was said to be evenly distributed between shia and sunni, than at the time of invasion it was branded as a Shia country. They have successfully turned Sunni City of baghdad into Shia. They will be propping up Shia population in Afghanistan as well, soon.

The population of non-pashtun areas has been exaggerated even if they are in the center of the country or any such areas that cannot support higher population density, which results in under representation of pashtun population in percentages. If we look at the Crop data of Afghanistan we will see that the province on the edges produces more than 2 crops a year while the provinces in the center and towards north east produces just one or a maximum of two, which again points towards low population density in the center and north east i.e. Hazara and Tajik areas. 

Then comes the histroy. Jamaludin Afghani, Ghilzai, Turis, Suri anyone or anything which is Pashtun and present pashtuns/Afghans in better light has been rebranded as someone else or the matter has been confused.

Majority of riverbanks and delta in Afghanistan have been populated by Pashtuns and thats a fact. How can Badakshan and Daikundi etc have same population as Kandahar or Helmand? and how can Takhar or Ghazni have same population as Nangarhar??

Pashtuns in Afghanistan makes around 60-65% of the Population, Tajiks are between 15-18%, Hazara and Uzbeks are between 7-9%. 

 Source: UCDavis

Source: UCDavis

Source: National Geographic 

http://www.said-afghani.org/seite-makalat/dr-rahmat-rabe-zerak-jar/Analysis-27.04.2013.pdf