English: This graph shows mean annual changes in the U.S. abortion rate by Presidential administration, from 1974 to 2019. Means are geometric means. For example, the abortion rate rose 19% in the Carter administration. The mean annual increase is 4.46%, because 104.46%*104.46%*104.46%*104.46%=119%.
The data, collected by the CDC, is taken from the following documents:
Gamble, Sonya B.; Strauss, Lilo T.; Parker, Wilda Y.; Cook, Douglas A.; Zane, Suzanne B.; Hamdan, Saeed (November 28, 2008). "Abortion Surveillance -- United States, 2005". Morbidity and Mortality Weekly Report. 57 (SS-13): 16.
Pazol, Karen; Gamble, Sonya B.; Parker, Wilda Y.; Cook, Douglas A.; Zane, Suzanne B.; Hamdan, Saeed (November 27, 2009). "Abortion Surveillance -- United States, 2006". Morbidity and Mortality Weekly Report. 58 (SS08): 13.
Jatlaoui, Tara C.; Boutot, Maegan E.; Mandel, Michele G.; Whiteman, Maura K.; Ti, Angeline; Petersen, Emily; Pazol, Karen (November 23, 2018). "Abortion Surveillance -- United States, 2015". Morbidity and Mortality Weekly Report. 67 (13): 20.
Kortsmit, Katherine; Mandel, Michele G.; Reeves, Jennifer A.; Clark, Elizabeth; Pagano, H. Pamela; Nguyen, Antionette; Petersen, Emily E.; Whiteman, Maura K. (November 26, 2021). "Abortion Surveillance -- United States, 2019". Morbidity and Mortality Weekly Report. 70 (9): 14.