Original: 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.
Simplified: The Guttmacher Institute estimated there were 2,200 intact dilation and extraction procedures in the U.S. during 2000 -  0.17% of the total number of abortions performed that year.