Split CSV by row count or a field, or merge files with identical headers.
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Use UTF-8 CSV or TSV up to 2 MB per file and 5 MB combined. Merge up to 20 additional files with exactly matching headers and at most 5000 total rows. Up to 100 output files can be downloaded individually. Export protects spreadsheet formula cells; import identifiers as text to preserve leading zeros.
Grouping the sample by country produces one file with the two US rows and one file with the GB row.