{
  "window_start": "2021-01-01",
  "window_end": "2026-07-01",
  "generated_at": "2026-07-21T17:28:56.208Z",
  "aggregated_from": "data/research/*-5y.json via pipeline/aggregate-5y.js",
  "price_points": 469,
  "price_anchor_points": 99,
  "price_interpolated_points": 303,
  "price_anchors_raw": 118,
  "inventory_points": 94,
  "inventory_monthly_points": 79,
  "inventory_print_alternates": 15,
  "inventory_observation_classes": {
    "reported": 60,
    "interpolated": 18,
    "reported_print": 1
  },
  "export_monthly_points": 96,
  "export_monthly_observation_classes": {
    "allocated_equal_month": 81,
    "allocated_bridge": 12,
    "reported": 3
  },
  "export_annual_points": 8,
  "destination_points": 48,
  "destination_years": [
    2020,
    2021,
    2022,
    2023,
    2024,
    2025
  ],
  "freight_history_points": 42,
  "intel_items": 170,
  "outlook_briefs": 24,
  "topics": 23,
  "glossary_terms": 54,
  "canada_hs2503_years": [
    2016,
    2017,
    2018,
    2019,
    2020,
    2021,
    2022,
    2023,
    2024,
    2025
  ],
  "us_usgs_years": [
    2018,
    2019,
    2020,
    2021,
    2022,
    2023,
    2024,
    2025
  ],
  "units": {
    "prices_seaborne": "USD/MT",
    "prices_tampa": "USD/LT",
    "inventory": "MT",
    "vancouver_exports": "MT solid sulphur (VFPA)",
    "canada_production": "MT (canonical); quantity_mt_millions also present",
    "us_usgs_annual": "kt sulfur content"
  },
  "quality_rules": [
    "Monthly Vancouver equal-month fills are observation_class=allocated_equal_month, not VFPA monthly prints.",
    "No platform-provisional 2026 Vancouver months until a public monthly/YTD print exists.",
    "Destination Other / unlisted is residual to VFPA annual so shares sum to 100%.",
    "Alberta inventory-monthly prefers AER ST3; trade-press prints live in inventory-prints.json.",
    "Canada production quantity_mt is metric tonnes; USGS world tables ingested as Mt are converted.",
    "Price mid series are monthly densified from public anchors; use prices-anchors.json for non-interpolated points.",
    "Licensed Argus/Platts/CRU weekly assessment series are not redistributed."
  ],
  "disclaimer": "Publicly citeable sulfur price anchors only for Sulfur Wire research. Points are tagged verified_public | industry_estimate | derived | platform_estimate. Licensed Argus/Platts/CRU weekly assessment series are not redistributed; where those agencies' figures appear, they are single values already published in open USGS PDFs, BC Insight/CRU news, Argus open news or public marketing sample PDFs, ChemNet OSP reprints, Hellenic/Platts open reprints, or similar open URLs. USGS Tampa contract points are in USD/long ton (LT); most seaborne solid sulfur is USD/metric ton (MT). USGS domestic average unit values (FOB mine/plant) are labeled as such and are not US Gulf export spot. Mid is the reported level or the midpoint of a published range. Not investment advice; markets move quickly."
}