If half the number of abortions are due to failed contraception, the other half is due to NO contraception.  Do the math.
ABC is here to stay.  Fewer than 5% of the Catholic population (the entire People of God) believes it to be sinful.  Indeed, sensible, reliable family planning is the obligation of every married couple.  What a faithful married couple does in the privacy of their bedroom is no concern and does not lie within the supervision of anyone but the marriage partners themselves.