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根据近20年来西方国家人口增长速度不断下降的情况,可以了解到西方已开始进入人口数字相对稳定,或者说零增长时期.人口动态可以根据出生率、死亡率以及关于居民随迁徙而增减的资料这三者之间的差额加以推断.在五十至六十年代,迁徙对于西欧国家人口状况来说,起着重要的作用.近年来,这种作用已逐渐消失.迁徙流在美国和加拿大的人口增长方面还有其现实意义.如果出生率是平均每个妇女在她的育龄期内生2.1个孩子,该国人口数字便可保持不变.八十年代初,只有5个西欧国家达到这样的出生率指标,其余国家却大大低于这一指标.最严重的是联邦德国,其育龄妇女的平均生育率只达到1.4个孩子.大多数资产阶级学者认为,出生率的下降过程具有长期性与不可逆性,尽管有时会出现短暂的增长期.根据预测,再
According to the declining population growth rates in Western countries in the past 20 years, we can see that the West has started to enter a relatively stable or zero-growth population period, and population dynamics can be based on birth rates, death rates, and information about the increase or decrease of residents with their migration In the 1950s and 1960s, migration played an important role in the demographic situation in Western European countries, a role that has gradually disappeared in recent years.The population of migratory flows in the United States and Canada There is also a real significance in terms of growth, and if the birth rate is 2.1 women per woman on average during her childbearing years, the population of the country will remain constant: in the early 1980s only five Western European countries had reached such a birth rate Indicators, the rest of the country is much lower than this indicator, the most serious is the Federal Republic of Germany, the average fertility rate of women of childbearing age has only reached 1.4 children.Most bourgeois scholars believe that the declining birth rate has long-term and irreversible, Although sometimes there will be a short period of growth.According to the forecast, and then