Derived from

SourceFidelityCountSpanRole
IA 2014 native spoolnative759,0342003-2014Bulk native body
NetNews CD lanenative8,7461992-1993Golden-age native fill
UTZOO bridge lanenative9871985-1991Early native bridge
UsenetArchives lanenormalized1,3421992-2002Header-cleaned bridge
Google Groups lanesynthetic617,5231992-2002Synthetic volume overlay
GG 1988-1991 lanesynthetic33,3811988-1991Synthetic hole-fill
Eternal September tailnative752024-2026Staged live-tail native

Gaps and caveats

  • Source rows overlap and are not additive. They document provenance, not a sum.
  • Synthetic GG coverage is reported separately and never added into native counts.
  • The 1988-1991 window is represented at synthetic fidelity today; native recovery remains an open path.

Source rows are provenance-only and overlap by design. Native headlines are deduped unions, and synthetic GG counts are never added into native totals.

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