The CDC doesn't publish abortion mortality data prior to 1972, but I did find data that Physicians for Life got from the National Center for Health Statistics. I've assessed elsewhere how accurate the data are, looking at an intensive study in Minnesota and another in California, and though they're not 100% complete, they're not radically off, and the trends (falling except for the 1950s) are accurate. From 1971 onward, my numbers are from the Centers for Disease Control.
Remember that "illegal" deaths as counted by the CDC (1972 and later) can actually be cases like Myrta Baptiste -- cases in which the woman thought the abortion was legal and safe, but after she died the CDC discovered that her doctor's license wasn't currently valid and so counted it as illegal.
Some of you may be saying, "Why should the CDC count ectopic pregnancy deaths as abortion deaths?" The answer is simple: Ectopic pregnancy deaths after abortion attempts simply should not happen.
I hope this puts abortion deaths in the 1970s in context. If you go to the individual years and read the women's individual stories, the combination of statistical and anecdotal data should help you come to an understanding of how and why women die from induced abortions in the United States.