I see, however keyword search is gone. I'll take your word for it.

Out of curiosity, I looked up of those who answered whether they strongly preferred to date their own skin/race. For the most part, ~15%-20% of asian women in western cities answered yes to that (but that usually means exclusively as opposed to just preference). The numbers are pretty much inline with CoffeeMeetsBagels showing 24% amongst East and SouthEast Asians strictly dating asian and 12% strictly dating white. And I suspect if it was broadened to be general preference, your numbers would match up.

For the asia thing, I looked up Singapore which was significantly more active than Korea, HK. If the activity is dead, I noticed oftentimes it becomes a niche foreigner site or or app something weird so I disregarded it (plus singaporeans can speak english so it includes the common man and not just the higher levels.

That said, of Singaporeans who answered to strongly prefer their own, ~50% answered yes and more than 50% for the Singaporean Chinese. In terms of overall preference, I think you're right in that 90% prefer asian and probably 50% of AF in Asia will only date asian. Out of curiosity, I looked up those looking for casual sex, almost none who answered they strongly preferred their own would was looking for casual sex.