I was looking at the table further down - UK results. Even ignoring the studies marked dubious it's still averaging well into double digits
> The police continue to misapply the "no-crime" or "unfounded" criteria.
> It is impossible to "discern with any degree of certainty the actual rate of false allegations" because many of the studies of false allegations have adopted unreliable or untested research methodologies.
It's a fairly high bar - it's not simply a matter of the alleged victim deciding to "press charges" as is sometimes portrayed in the media, and is subject to significant external oversight (it's not just the police who are involved).
So "no charges filed" is very very different to "unfounded" in the UK, which rather casts doubt on any part of this table which is conflating the two.