I want to know the answer to the following question:
How much did the number of Italians residing in Eritrea increase in 5 years due to factories being built?
All the background I'm provided with is that "The number of Italians residing in the territory increased from 4,600 to 75,000 in five years; and with the involvement of Eritreans in the industries, trade and fruit plantation was expanded across the nation, while some of the plantations were owned by Eritreans.". Is that enough to answer the question?