The number of citizens. In the case of countries with dense citizens and the country's productivity is not sufficient.People's needs. The Government is seeking to buy goods from abroad to meet demand.
The number of citizens In the populous country, and the productivity of the country is not sufficient to the needs of the government, the need to purchase goods from abroad to meet those needs.
The number of citizens. If the country is densely populated and the output of the country is not enough for the needs of the people, the government may need to order goods from abroad to provide sufficient to meet demand that .