How many people know they're autistic, so far.
These are the studies from various countries and teams.
England & Scotland data taken from the official school records.
The problem is, not everyone knows they're autistic.
The tests & assessments tend to find white males/

/because that's what they were expecting to find, many decades ago.
It simply never occurred to people that autism might 'look' different in e.g. females, BAME communities, older people, males who don't present in typically male ways, etc./

I suspect we are nowhere near finding most of the females.
Why do I suspect this? From conversation with diagnostic professionals who are updating their info and having 'oh heck!' moments.
From parents struggling to get their daughters diagnosed, whereas the son was easy/

/...from the number of autistic females I've encountered over the last decades who had gone 'under the radar' for so many years until someone finally had that 'aha!' moment.
And so many with identical presentations who are still struggling to get diagnosed/

Being clear that many diagnostic teams are fabulous.
It's simply a reality that the tools they were given were designed to pick white men.
Let's look at some examples:/