That number would have to be worldwide if it’s reliable at all. The highest estimates for America is a little more than a million a year since 1973 which would put the number around 60 million.
Correct, that’s the worldwide number since roe-v-wade.
The link above has links to estimates. For sake of argument, 50 million deaths worldwide, for only 10 years, puts the number halfway to a billion worldwide. 2023 will be the Jubilee Anniversary of Roe-v-Wade (50 years).