I just achieved that goal. My eldest is 71 and healthy. Let's hope he stays that way for a while (in 2 games, I haven't had anyone live past 77). I achieved this in Normal mode and did not use pause at all; rather, I kept it at 1/2 time. My current population is 23, but 2 of those villagers are "guests"--that is, not born with the group but found elsewhere.

BTW, how many children must a woman have before she gets out of "trainee parent"?