Why is the link to non-binary always made to trans? Which I didn’t even refer to at all in the previous post. Those three classifications deal with a broad overview of intersex conditions.
Anyway, here’s some numbers for you since either way those ones are way off.
Approximately 1.7% of any given population will have one of the 40+ conditions which are classed as intersex conditions. 0.05-0.07% (of total population) will be diagnosed with genital ambiguity at birth, resulting in an immediate surgical intervention; others may be subject to surgery later in life. The low end of the genital anomalies is where that outdated figure of “1 in 2,000” that is often cited comes from.
Current figures on transgender populations indicate their numbers to be somewhere between 0.53% and 0.58%. This is generally rounded up to 0.6% for convenience and to account for people who don’t admit to such things on a census or survey. This figure applies to all those who simply identify as transgender. Restricting that to those who are or have undertaken medical transition (HRT and/or surgery) and the figure drops to less than 0.01%, but it too is rounded up to that point.
So there’s no way you’re working with 99% or more, Miles was closer.
If you want to exclude intersex from dimorphic analysis, then you’re dealing with 98.3% of the population, maybe less. If you also exclude transgender then that drops to 97.7%, maybe less.
Don’t worry about overlap between intersex and transgender, most diagnostic methods for diagnosing gender sysphoria (formerly gender identity disorder) require the subject to not be intersex; once someone is diagnosed as intersex they can’t be diagnosed as transgender. Sometimes people will claim to be both, but more often than not that’s a transgender person trying to prop up some kind of argument somewhere. The exceptions to that are rare.
As for the rest of your answer, I’ll have to come back to it a bit later. There are currently PAX stuff requiring my attention.