I'm not aware of specific figures from the other jurisdictions you've referenced. It would most likely be places like Belgium, for instance, that would provide that. There is certainly information that's more easily available regarding, for example, what the criteria are, such as, for example, what the ages are, what the requirements are, such as whether or not parental consent is required, or if it is simply consultation with parents.
To go back to the first part of your question, there's the issue of whether capacity assessment is subjective or objective. Maybe a way of looking at it is that capacity assessment, as I understand it, in Canada doesn't mean that a person decides for themselves whether they are capable. It's an assessment made by the practitioners, an objective determination. Generally, for adults, there's a presumption that people are capable of making medical decisions for themselves, but if the practitioner has reason to doubt that, then they're able to engage in an assessment using various instruments to help validate whether the person has capacity to make a particular type of decision.
For mature minors, for example, if that is something the committee is interested in exploring—