Censuses 1991, 2001, 2011: Indicators on population structure and population growth

The dataset contains statistical indicators on structure and demographic changes calculated on the basis of Census data 2011, 2001 and 1991. The indicators are calculated at three levels of detail: municipality of Milan;9 municipalities;69 NIL with a population of over 3,000 inhabitants. For a limited number of indicators, the 1991 and 2001 figures are only disseminated at municipal level. The indicators are defined as follows: * 1) Housing density (Relation between the population resident in the area and the area area in square kilometers); * 2) Ten-year percentage change in population (Percentage ratio between the change in legal population between two censuses and the legal population at the previous census); * 3) Average age of the population (Average age weighted with the amount of population of each age); * 4) Population over 65 each child (Relation between the population of 65 years and over and children under 6 years old); * 5) Large elderly per 100 residents (Percentage ratio between the population of 85 years and over and the total population); * 6) Population of inactive age per 100 active-age residents (Percentage ratio between the population of non-active age, 0-14 years and 65 years and older, and the population of active age, 15-64 years).本数据集包含基于2011、2001及1991年三次人口普查数据测算得到的人口结构与人口变迁统计指标。该类指标共设置三级细化统计粒度：米兰市（Municipality of Milan）层级、9个市镇联合层级，以及69个人口规模超3000居民的邻里街区（NIL）层级。针对少量指标，1991年与2001年的统计数据仅以市镇级粒度对外发布。各项指标的具体定义如下：1. 住房密度：区域常住人口数量与区域平方千米面积的比值；2. 人口十年变化率：两次人口普查间法定常住人口变动量与上一次普查时点法定常住人口的百分比比值；3. 人口平均年龄：以各年龄组人口数为权重计算的加权平均年龄；4. 65岁及以上人口与6岁以下儿童人口的比值；5. 每百名常住人口中的高龄老人占比：85岁及以上人口与总人口的百分比比值；6. 非劳动年龄人口占劳动年龄人口的百分比：0-14岁及65岁及以上的非劳动年龄人口与15-64岁劳动年龄人口的百分比比值。