I think the reason you're seeing more senior people here at NDHQ is that the roles or the positions here at NDHQ are more senior ones, so by default those individuals would be more senior individuals, as opposed to positions on the ship, which would be more operational tradesmen.
Regarding the statistics as they relate to the CF, if you're just looking for a statistic overall, for women, for the regular force, I believe it's approximately 15%, and for the reserves it's a little bit higher. Of course, depending on which element you look at, which trade, those can change. But I would advise that the actual statistics be taken from the organization that collected that information.