Dear IPUMS community,
I am searching for county-level counts of the population by place of birth (BPL) for the years 1870, 1880, 1900, 1910, 1920, and 1930. What is the best way to get this data? Should I download the publicly available samples online, and how should weigh them to aggregate them to the county-level? Or should I apply for the full sample access of these years? Or is there a way to directly download the data at the county level?
Thank you very much.