By gestational age and method

Abortion rates also vary depending on the stage of pregnancy and the method practiced. In 2003, from data collected in those areas of the United States that sufficiently reported gestational age, it was found that 88.2% of abortions were conducted at or prior to 12 weeks, 10.4% from 13 to 20 weeks, and 1.4% at or after 21 weeks. 90.9% of these were classified as having been done by "curettage" (suction-aspiration, D&C, D&E), 7.7% by "medical" means (mifepristone), 0.4% by "intrauterine instillation" (saline or prostaglandin), and 1.0% by "other" (including hysterotomy and hysterectomy).[3] The Guttmacher Institute estimated there were 2,200 intact dilation and extraction procedures in the U.S. during 2000; this accounts for 0.17% of the total number of abortions performed that year.[4] Similarly, in England and Wales in 2005, 90% of terminations occurred at or under 12 weeks, 9% between 13 to 19 weeks, and 1% at or over 20 weeks. 71% of those reported were by vacuum aspiration, 5% by D&E, and 24% were medical.
"Abortion." Abortion. Wikipedia. 17 May 2007