Yes, but not reliably (for contraception) or safely (for abortifacients), and by their nature, 80% reliable contraception is of dubious utility.
You realise the quoted reliability rates are per year, not per act? For example, the withdrawal method (available to everyone, for all time) has a reliability rate of 78% for typical use and 96% for perfect use.  Obviously, even at 78% reliability over a year, that is of a great deal of utility. 78% of the time a woman whose partner practises withdrawal will not get pregnant over the course of a year.
I suppose it could conceivably just be the ability to treat STDs, but I don't think that's enough, personally. YMMV. (Plus I'm not sure that the time works out correctly.)