An Anonymous Guest Post
Danish data: 7.3% of cases the case is closed with a judgement against the accuser for lying. Same limitations apply as with the data you cite here. The police clearly think there are more lying accusers, but it's not possible to prove. I would trust police's word over the court outcomes, so maybe 30-50% of claims are indeed false.
"Most accusations are true" is compatible with "most accusations are legally unsubstantiated" if the legal system sucks at identifying true accusations.