1. NonProbEst::population
    A full population
    csv| xlsx| json| ndjson| rda| rds
    data.frame|50000 x 6
  2. NonProbEst::sampleNP
    A non-probabilistic sample
    csv| xlsx| json| ndjson| rda| rds
    data.frame|1000 x 9
  3. NonProbEst::sampleP
    A probabilistic sample
    csv| xlsx| json| ndjson| rda| rds
    data.frame|500 x 5