Washington Post says:
The number of abortions performed in the United States dropped to 1.2 million in 2005 -- the lowest level since 1976, according to a new report.
"It could be more women using contraception and not having as many unintended pregnancies. It could be more restrictions on abortions making it more difficult for women to obtain abortion services. It could be a combination of these and other dynamics," said Rachel K. Jones of the Guttmacher Institute, a reproductive-health research organization, which published the report in the March issue of the journal Perspectives on Sexual and Reproductive Health.
The abortion rate varies widely around the country, tending to be higher in the Northeast and lower in the South and Midwest.