Original sentence: The estimated number of abortion procedures per year prior to 1973 ranges from 1,000,000 to 100,000 compared to the CDC's 1997 statistic of 1,186,039, (1997 being the last year where privacy laws allowed national tracking)
Edited sentence: The estimated number of abortion procedures per year prior to 1973 ranges from 1,000,000 to 100,000 (Iowa right to life committee) compared to the CDC's 1997 statistic of 1,186,039, (1997 being the last year where privacy laws allowed national tracking)