That includes miscarriages - which is very different from an abortion the last time I checked. Plus I think miscarries are not a rare occurence so I bet most of the number comes from that. Plus this "Institute" is using some strange notation called "At current rates". And to top it all off I don't even think it's possible to get good abortion numbers - I don't believe that clinics just share their numbers and I don't believe these numbers are audited.
People throw numbers around and then somehow they become statistics and somehow everyone starts quoting them. Divorce, gays, gun accidents in the home, etc.
-Rudey