<Tr> <Td_colspan="2"> other Mediterranean Sea peoples, Other Romance peoples </Td> </Tr> <P> Demographically, the Roman Empire was an ordinary premodern state . It had high infant mortality, a low marriage age, and high fertility within marriage . Perhaps half of Roman subjects died by the age of 5 . Of those still alive at age 10, half would die by the age of 50 . Roman women could expect to bear on average 6 to 9 children . </P> <P> At its peak, after the Antonine Plague of the 160s CE, it had a population of about 60--70 million and a population density of about 16 persons per square kilometer . In contrast to the European societies of the classical and medieval periods, Rome had unusually high urbanization rates . During the 2nd century CE, the city of Rome had more than one million inhabitants . No Western city would have as many again until the 19th century . </P> <P> For the lands around the Mediterranean Sea and their hinterlands, the period from the second millennium BCE to the early first millennium CE was one of substantial population growth . What would become the territory of the Roman Empire saw an average annual population growth of about 0.1 per cent from the 12th century BCE to the 3rd century CE, resulting in a quadrupling of the region's total population . Growth was slower around the eastern Mediterranean, which was already more developed at the beginning of the period, on the order of about 0.07 per cent per year . This was stronger growth than that seen in the succeeding period; from about 200 CE to 1800 CE, the European half of the empire only saw about 0.06 to 0.07 per cent annual growth (Europe as a whole saw 0.1 per cent annual growth rates), and the north African and west Asian parts of the empire saw almost no growth at all . </P>

Population of the roman empire at its peak