10%~15%. Maybe less. Though they are quite common, a lot of other people also use humans as avatars like normal people. Statically speaking however, from the first two pages of general chat, 40%~50% are cats. I believe this shouldn't be the case however you should know more as you are one yourself. Edit: At least that's based on avatars on NUF. Based on how many people are cat people, this study was made by live science, though I don't know if they're credible or not, that 11% percent of people they conducted a survey on said they were cat people. Here, https://www.livescience.com/45894-dog-cat-people-personalities.html#:~:text=Participants also answered a slew,animals, or neither animal.
. . . . I more a cat cosplay than real cat. . . For I know that I don't had skill to take care real cat for I will been busy but an Cat ears, nothing to say.