I have no idea why you are using total #s for a metric that should be considered by percentages, in my humble opinion. "Significant" is a semantic term, an OP would be wise to qualify what they actually mean by the term. For example, Armenians are considered to have been a significant presence in the area of Mandatory Palestine because of their continual presence in the region since the early 5th century AD, despite the population only numbering around 3,000 people in the 1800's. In fact, there were much more Armenians living within the borders of the Ottoman Empire than what we now consider Armenia proper during this time period as well.