True, following up on all those deaths related to having had an abortion would be a lot of effort. But not even directly related medical causes are documented as far as I know. That can’t be that difficult if they do it for almost every other disease, drug and surgically related cause of death. Even psychologically related deaths could be statistically tracked for those under the care of a psychiatrist or psychologist. It certainly wouldn’t account for them all but numbers can be found for causes of suicide based on other emotionally traumatic factors.
The value of statistical analysis is you don’t have to count every case....
Once you come up with the Factor...be it 5% or 1 % you then just need raw numbers....
That’s how polsters manage to poll a few people and project to larger numbers...