12.For more than a decade, Li Dongmei operated a series of kindergartens and schools for young children, withstanding the realities of China's declining birthrate.
14.Like every other industrialized country that made the transition from an agrarian society, Japan's birthrate exploded throughout the process and peaked in the nineteen twenties.
15.The average number of children born to a woman in the country last year fell to 0.98, giving South Korea the lowest birthrate among the world's richest nations.
16.But after 1950, Japan's birthrate began to take a nosedive to the point in the nineteen sixties, Japanese women were only having two children on average.
17.Jennifer Glass, a demographer at the University of Texas at Austin, notes that some countries have tried to boost their birthrates by urging citizens to get busy.
19.Demographers say the United States may be entering an era of substantially lower population growth due to a leveling off of immigration, a declining birthrate and an aging population.
20.That higher birthrate of food producers, together with their ability to feed more people per acre, lets them achieve much higher population densities than hunter-gatherers.