US Census Longitudinal data

The data file contains multiple variables at the census tract level (using 2010 tract boundaries) for the years 1980, 1990, 2000, 2010, and 2019. Note that the 1970 data is not compailed because the 1970 decennial census does not have a question about ethnicity. Another caveat is that the US was fully tracted from 1990 census, which means that many tracts do not have data in the year 1980.本数据集文件包含1980、1990、2000、2010及2019五个年份下，以2010年普查片区（census tract）边界为基准的多项变量数据。需注意，1970年的相关数据未被汇编，原因是1970年十年一次人口普查（decennial census）未设置族裔相关调查问题。另有需要说明的限制条件：美国自1990年人口普查起才实现全国普查片区全覆盖，这意味着1980年的多数普查片区并无对应数据。