主要统计指标解释

［人口数］指一定时点、一定地区范围内有生命的个人总和。

［城镇人口和乡村人口］城镇人口是指居住在城镇范围内的全部常住人口；乡村人口是除上述人口以外的全部人口。

［出生率(又称粗出生率)］指在一定时期内（通常为一年）一定地区的出生人数与同期内平均人数（或期中人数）之比，用千分率表示。本资料中的出生率指年出生率，其计算公式为：

［死亡率(又称粗死亡率)］指在一定时期内（通常为一年）一定地区的死亡人数与同期内平均人数（或期中人数）之比，用千分率表示。本资料中的死亡率指年死亡率，其计算公式为：

［人口自然增长率］指在一定时期内（通常为一年）人口自然增加数（出生人数减死亡人数）与该时期内平均人数（或期中人数）之比，用千分率表示。计算公式为：

［总抚养比］也称总负担系数。指人口总体中非劳动年龄人口数与劳动年龄人口数之比。通常用百分比表示。说明每100名劳动年龄人口大致要负担多少名非劳动年龄人口。计算公式为：

其中：GDR为总抚养比；

          P_0~14为0～14岁少年儿童人口数；

          P₆₅⁺为65岁及65岁以上的老年人口数；

          P_15~64为15～64岁劳动年龄人口数。

Explanatory Notes on Main Statistical Indicators

Total Population  refers to the total number of people alive at a certain point of time within a given area.

Urban Population and Rural Population  Urban population refers to all people residing in cities and towns, while rural population refers to population other than urban population.

Birth Rate (or Crude Birth Rate)  refers to the ratio of the number of births to the average population (or mid-year population) during a certain period of time (usually a year), expressed in ‰. Birth rate in the chapter refers to annual birth rate. The following formula is used:

Death Rate (or Crude Death Rate)  refers to the ratio of the number of deaths to the average population (or mid-year population) during a certain period of time (usually a year), expressed in ‰. Death rate in the chapter refers to annual death rate. The following formula is used:

Natural Growth Rate of Population  refers to the ratio of natural increase in population (number of births minus number of deaths) in a certain period of time (usually a year) to the average population (or mid-year population) of the same period, expressed in ‰. The following formula is applied:

Gross Dependency Ratio  also called gross dependency coefficient, refers to the ratio of non-working-age population to the working-age population, express in %. Describing in general the number of non-working-age population that every 100 people at working ages will take care of. The gross dependency ratio is calculated with the following formula:

Where: GDR is the gross dependency ratio,

           P_0-14  is the population of children aged 0-14,

           P₆₅⁺  is the elderly population aged 65 and over, and

           P_15-64 is the working-age population aged 15-64.