<s>[INST] As of 1680, the English speaking population of New England of about 100,000 people were all descended from 21,000 people who came from England between 1620 and 1640.
Due to the high infant mortality rate and lower life expectancy at the time, less than 50% of the children survived into adulthood.
Assume that there are about 120 years in 3 generations and that a generation in this time was about 40 years.
Assuming that there is no population growth outside of the 21,000 immigrants and that the number of adults are counted at 40 years of age, the approximate number of adults that survived out of the 21,000 immigrants would be 10,500.
Then using the approximate number of adults that survived as a base, the population growth should be calculated every 40 years.
The final population of 100,000 descendants should be reached around the third generation.
The table I started is below.

| Generation # | Number of adults | Year |
| --- | --- | --- |
| 1 | 10,500 | 1660 |
| 2 |?[/INST]