the crown had about double the population of lithuania and five times the income of the latter's treasury. as with other countries, the borders, area and population of the commonwealth varied over time. after the peace of jam zapolski (1582), the commonwealth had approximately 815,000 km area and a population of 7.5 million. after the truce of deulino (1618), the commonwealth had an area of some 990,000 km and a population of 11–12 million (including some 4 million poles and close to a million lithuanians).