I am assuming you mean for an individual not for humanity as a whole.

That's actually a really tough question and is going to be different for each person depending on their ancestry and how often they moved and/or married (Being polite) people from vastly different populations.
based on migration patterns and this I would say you are probably looking at an increase, statistically, every time there was a big colonization push and/or a new travel method became popular enough jack and Jill Average could use it to go somewhere and live for a while.

So based on this I would say 17th Century going forward with a hard stop in 1914.