First, thanks for attempting to substantiate your data by more than simple assertion. It helps immensely.
"The majority, approximately 85% subscribe to the Sunni Hanafi School for interpreting the Quran and Hadith."
Forgive me for not yet reading your document but I promise I shall.
If we accept the C.I.A. World Factbook's estimate of 28,395,716 afghans, that 15% remainder would represent approx. 4.2m afghans that don't subscribe to such. Since we know that 9% of the population is hazara, we can assume that they are virtually all shia, no?
That would mean no less than 2.8 million but the C.I.A. factbook suggest that 19% of the afghan population are shia. No doubt portions of the turkomen, tajik, and uzbek communities as well as some other tribes near the Iranian border? That would constitute nearly 5.6m of all afghans whom are non-sunni. The difference between your data and their's is about 5% of the total population or 1.4m afghans.
None of this speaks to your original assertion, however. Remember, that you contend that 99.9% of the TALIBAN ascribe to a Hanafi interpretation. You could well be correct, especially among the rank and file. My concern would be among their leadership, however and that will naturally prove far more difficult to ascertain without asking them.
Allow me to read your document and consider this some more. We know that wahabbist/salafist donors play a significant funding role in this war. To what extent they've been able to promote their religious vision among the afghan taliban leadership seems important.
Again, I appreciate your efforts.
Thanks.