It means that the survey had zero India/China born developers in its sample. The page links to https://usa.ipums.org/usa/sampdesc.shtml#us2017a which states that the AMERICAN COMMUNITY SURVEY 2017 SAMPLE is a "1-in-100…
It means that the survey had zero India/China born developers in its sample. The page links to https://usa.ipums.org/usa/sampdesc.shtml#us2017a which states that the AMERICAN COMMUNITY SURVEY 2017 SAMPLE is a "1-in-100…