The population of Buenos Aires, Argentina, is projected to increase from its current level of 11 million to 13.2 million by the year 2000. The City of Buenos Aires proper accounts for less than 30% of the metropolitan population. During the 1970s, for the 1st time in its recorded history, Greater Buenos Aires registered a slower growth rate (1.6%/year) than Argentina as a whole (1.8%/year). In contrast, the peripheral municipalities increased in relative weight from 37% of the metropolitan population to 70% in 1980. 55% of the metropolitan population lives in nuclear families, with both parents present; 36% of these families have no children, 27% have 1 child, and 25% have 2 children. 1-person households comprise 17% of total households. A low birthrate (18.1/1000 in 1979), a life expectancy slightly over 70 years, and some net outmigration combine to make the population of the Federal Capital the oldest of any large Latin American city. In 1980, its median age was 36.7 years. The death rate stood at 12.7/1000 in 1979. The share of the population comprised by foreigners has declined over the years, and stood at 13.2% in the City of Buenos Aires in 1980 and at 11.5% in the metropolitan area as a whole. Italians and Spaniards remain the principal groups of foreign born. Internal migration to the metropolitan area continues to be strong; 49% of the 1.5 million people who changed their residence between provinces in 1975-80 went to Greater Buenos Aires. The literacy rate in the Federal Capital is 99% and 97% in the Metropolitan Area as a whole. The 1980 census revealed that 51.5% of the population over 14 years of age were economically active. Women comprise 31% of the labor force. The median income of workers in the metropolitan area was estimated at US$235/month in 1982. The percentage of families whose income is considered inadequate to supply their basic needs ranges from 2.1% in the Federal Capital to over 5% in poorer districts.