Demographers determine the age structure of a given population by dividing it into five-year age-groups and arranging them chronologically in a pyramidlike structure that "bulges" or recedes in relation to the number of persons in a given age cohort. Many poor, developing countries have a broad base and steadily tapering higher levels, which reflects a large number of births and young children but much smaller age cohorts in later years as a result of relatively short life expectancies. North Korea does not entirely fit this pattern; data reveal a "bulge" in the lower ranges of adulthood (see fig. 4). In 1991 life expectancy at birth was approximately sixty-six years for males, almost seventy-three for females.
It is likely that annual population growth rates will increase in the future, as will as difficulties in employing the many young men and women entering the labor force in a socialist economy already suffering from stagnant growth. Eberstadt and Banister estimate that the population will increase to 25.5 million by the end of the century and to 28.5 million in 2010. They project that the population will stabilize (that is, cease to grow) at 34 million persons in 2045 and will then experience a gradual decline. By comparison, South Korea's population is expected to stabilize at 52.6 million people in 2023.
Data as of June 1993
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