Carol Tobias, president of the National Right to Life Committee, described the overall drop in abortion numbers as evidence that the anti-abortion movement's lobbying and legislative efforts were having an impact.
"It shows that women are rejecting the idea of abortion as the answer to an unexpected pregnancy," she said.
Americans United for Life, another anti-abortion group engaged in the efforts to pass restrictive state laws, said Guttmacher's numbers should be viewed skeptically because they are based on voluntary self-reporting by abortion providers.
"It is impossible really to know the true abortion rate," said the group's president, Charmaine Yoest.
The report marked the 16th time since 1973, when abortion was legalized nationwide, that Guttmacher has attempted to survey all known abortion providers in the U.S. However, a section of the new report acknowledges that some abortions might not be tallied.
The highest abortion rates were in New York, Maryland, the District of Columbia, Delaware and New Jersey; the lowest were in Wyoming, Mississippi, South Dakota, Kentucky and Missouri. However, Guttmacher said many women in Wyoming and Mississippi, where providers are scarce, go out of state to get abortions.
Follow David Crary on Twitter at http://twitter.com/CraryAP