Simplify the following text for a Grade 6 native English-speaking person.
Original: This led to yet another period of prosperity , with the town 's population rising from 16,780 in 1921 to almost 25,000 in 1935 .
Simplified: This led to another time of growth , with the number of people in the city rising from 16,780 in 1921 to almost 25,000 in 1935 .