How many late term abortions after 24 weeks in the USA?

The Centers for Disease Control and Prevention's yearly study on abortion statistics does not calculate the exact gestational age for abortions performed past the 20th week. Therefor there aren't any precise data for the number of abortions performed after viability. In 1997 the Guttmacher Institute estimated the number of abortions in the U.S. past 24 weeks to be 0.08% which then was about 1,032 abortions performed to save the life of mother and child/year. There are overall less abortions performed today in 2012 but and we might be better and making a diagnosis but the number is probably about the same today, about 1000 women.