The number of abortions performed in the U.S. continues to fall, according to new data.

The Guttmacher Institute, which advocates for abortion rights, released the data Wednesday.

In 2017, the group says, there were 862,320 abortions, down from a previous survey that showed the procedure was performed 926,200 times in 2014.

The current abortion rate is 13.5 per 1,000 women ages 15 to 44, according to NPR.

While many states have tried in recent years to roll out various limitations on abortions, the Guttmacher Institute doesn't believe those new laws are what's driving the decrease in most cases.

"I don't think there's a clear pattern around why rates are falling," Guttmacher's Elizabeth Nash told NPR. "They're going down across the country in nearly every state."

In states with strict new laws now on the books, Nash said it's not unusual for women to drive to neighboring states to have the procedure performed instead.

One trend Guttmacher identified in its report was that medication is being used in a growing number of abortions, instead of surgery. Medication is now used in nearly 40% of abortions.