Trimtabist
The US Trade Ledger — every US container gateway, every partner country, every month. Census-recorded, AIS-verified.
TT-008 · Port ledger

Census restatements observed, by month of data

tt008.revisions.count observed

How many figures Census has restated or withdrawn, keyed to the MONTH THE DATA DESCRIBES rather than when we noticed. Shows which months keep moving after publication. Excludes backfill — our own columns arriving is not a source change.

We pulled this number.

STATUS: WITHDRAWN · SINCE 1970-01 · RETURNS WHEN THE CONDITION BELOW IS MET

NO OBSERVATIONS YET. The archive holds 20,618 entries and every one is a `backfill` — our own air_weight_kg column arriving for the first time — with zero genuine restatements. A revision can only be observed by re-fetching a month we already hold and finding it changed, and until 2026-07-30 nothing did that: the weekly timer ran a superseded collector that crashed against the migrated schema. It now re-syncs the last six months every Friday. Lift when the archive holds genuine `revision` or `withdrawn` entries across at least a few distinct months — not on the first one, which could be a one-off. We will not serve data we cannot stand behind, so this page stays up but the numbers do not.

More on the practice: withdrawn data.

Unit
restatements
Evidence
EVIDENCE: OBSERVED
Tempo
TEMPO: LONG
Covers
2026-07-30 → now

We watched it happen: our own AIS receivers (via the aisstream.io terrestrial network), our timestamps, our archive.

Cite this

In print: Census restatements observed, by month of data, per the Trimtab US Trade Ledger, an independent mirror of US Census Bureau, intltrade/imports/porths (retrieved 2026-08-06) — trimtabist.com/series/tt008.revisions.count
For the record: Trimtab TT-008 Port ledger, "Census restatements observed, by month of data" (retrieved 2026-08-06).
Trimtabist TT-008 Port ledger revision archive. Every figure is compared against what we previously held; the prior value is preserved before any update. Method: portledger/METHOD.md. Grade: observed — this measures OUR OWN record of the source changing, not a figure the source published.
Licence CC BY 4.0

This address is permanent. If this figure is revised or corrected, the change is printed here with its size.

Machine readable

Updated: 2026-08-06 (regenerated on every request from the live registry)
/series/tt008.revisions.count.csv — tidy long format
/series/tt008.revisions.count.metadata.json — provenance, coverage, citation
POST /mcp — query_series, describe_series