Census of Population and Housing, 1990: Summary Tape File 3A

Summary Tape File 3A contains sample data weighted to represent the total population. The collection also contains 100-percent counts and unweighted sample counts for total persons and total housing units. Additional population and housing variables include age, ancestry, disability, citizenship, education, income, marital status, race, sex, travel time to work, rent, tenure, value of housing unit, number of vehicles, and monthly owner costs. The data for the states include 178 population tables and 99 housing tables. The information for Puerto Rico includes 149 population tables and 101 housing tables. Data are provided for states and Puerto Rico and their subareas in hierarchical sequence down to the block group level.

摘要磁带文件3A（Summary Tape File 3A）包含经加权处理以代表总体人口的抽样数据。该数据集同时涵盖针对总人口与总住房单元的全量统计数据及未加权抽样统计数据。额外收录的人口与住房统计变量包括：年龄、血统、残疾状况、公民身份、受教育程度、收入、婚姻状况、种族、性别、通勤耗时、租金、住房保有形式、住房单元价值、车辆拥有数量以及自有住房月度持有成本。针对美国各州的数据包含178张人口统计表与99张住房统计表；针对波多黎各（Puerto Rico）的统计信息则涵盖149张人口统计表与101张住房统计表。本数据集覆盖美国各州、波多黎各及其各级次级区域，层级序列下探至街区组（block group）层级。