[lpmay]

I would never have guessed this configuration was so rare. D-sub connectors seem to have more active use in aerospace and defense that you might expect (Until I started working professionally, I always associated them with "old" computers, not high end stuff).

[Dwedit]

9 and 25 are the common ones, 19 is the rare one.

[mrWiz]

37 is surprisingly common too.