I can confirm that to my knowledge there has been a successful DO application brought against a woman. I know of one. There may have been others, but I can't confirm that.
As to current dangerous offenders in the system, we can undertake to contact Correctional Services and make those inquiries on your behalf and get back to you if they're not appearing directly as a witness.
At Justice Canada, we have not done a gender-based examination of part XXIV applications. I would not be qualified to respond as to the number of potential applications that could have been done over five years or any of the other questions, except to confirm that I know of one woman who has been successfully DO'ed once.