For the first time in the nation's history, by 1920 over percent of the population were urban dwellers.

The answer that fits the given blank above is 50. In the year 1920, it was first time in the history of the nation that there were over 50 percent of the population who were urban dwellers. Urban dwellers are those people who resided in the urban area or city area.

What effect did the development of trade have on settlement patterns in medieval times