Data source policy
- Prefer official statistical agencies, peer-reviewed datasets, or international institutions.
- Store source links and snapshot dates for every update.
- Document revisions with impact notes in chart changelogs.
Methodology
Transparency rules for data sourcing, transformation, and chart publication.
Chart QA checklist
- Consistent units and complete time ranges.
- Clear flags for estimates, interpolation, and breaks in series.
- Downloadable data plus a citation block on every chart page.