I work off the 1% solution. My guess is very conservative, I'd ponder. My logic is this. We were all diaper wearers at our early stages in life. Some of us got stuck. Men, women, fairly equally, I'd guess, though men seem to be more fairly represented online.
To fathom that only 1 out of 100 had some good feelings associated with wetting or soiling diapers, years of potty training, (over?) protective parenting, and also maybe some had bad feelings (shame, humiliation, etc) from bed/pants wettings, I'd have to guess the number is way higher than 1%. But, if it were only one percent, keeping in mind 100% of us wore diapers, and had the possibility of having had some associations drawn up by the infant & toddler brain, then, in the USA there would be on the order of 3,500,000 people that could conceivably be inclined towards the love of diapers, or things babyish. Considering that our community is made up of computer savvy types, that tend towards technology, it isn't too much of a surprise that we seem so few and far in between. As others have said, who knows a panty fetishist, a foot fetishist, and chains & whips type, a cuckold relationship, etc. etc.? I don't know anyone into any of this stuff, and I've been around on the planet for almost 63 years. Knowing another diaper lover, or adult baby runs the same way. I don't know anyone, other than online friends.
Point is, we do exist. You see all the references in the media, in our songs, online, etc. The numbers may not be 1%, but I'd be surprised if it's lower. I actually think it's higher, but I'm happy erring on the conservative side of things. Either way, it doesn't really matter, unless a person needs to feel that everyone around them is ok with diapers (they're not), and that they'd just accept finding you (the figurative) also like them. Not likely. Be satisfied with your own choices. Don't get hung up on the numbers. We have a place to hang together, and that, in itself, should be enough. It is for me...