This reflects partial, voluntarily submitted state data on legally induced abortions as requested by the Centers for Disease Control and Prevention (CDC). It should not be treated as an exhaustive count of abortions. California, Maryland, and New Hampshire have never provided data to this reporting process and so are excluded from the count below — meaning that the real total of abortions is likely higher. Other states have also periodically chosen not to submit reports, and not all contributing states opt to collect or provide the same level of detail about about abortions in their area. Because of this, breakdowns may use only a smaller subset of the data that meets reporting standards.
That said, with the available sample of data, the CDC can show trends in the distribution of abortions by age group, marital status, race and ethnicity, and other factors.