I have no idea what you are referring to either but I know about the Viking settlements, thank you. Being of Native American decent, I have spent most of my life studying our history and one thing I know for fact is, 96% of the population did not die before the pilgrims landed, nor afterwards. If that had happened, the NA race would have been functionally extinct. I as well as my family are living proof that didn't happen.
There were smaller tribes, such as the Mandan/Hidasta that were virtually wiped out by smallpox. I believe cases like that is where you got the 96%, but that applies only to specific tribes, not Native Americans as a whole.