First of all, we don't get much from DND. Whatever I know I pick up from the net and other publicly produced things. I suppose it could be figured out from your start point of how many people were enrolled, how many are left at the end of a year, and so on. I've never seen any numbers that break retention down by gender or any other way. It's just one number that I've ever seen.
On February 7th, 2019. See this statement in context.