Country-level macroeconomic context with the original reporting years, combined with 9 World Port Index geographic locations. Source classifications are not a ranking of the busiest ports.

World Bank World Development Indicators. Each value shows its published year; missing data are never estimated.
Historical nominal GDP in current USD, not inflation-adjusted; do not interpret as real growth without the separate growth series.
Insufficient consecutive published observations for a useful chart.
Export and import percentages describe total goods and services relative to GDP. Fuel merchandise trade percentages describe broad fuel categories; they are not crude-oil production, tanker fixture prices or a list of trade partners.
Where imports and exports originate: country-by-country trade partners and commodity flows require a separate verified UN Comtrade dataset. Maritime Bridge does not infer bilateral flows from macro trade shares.
Geographically referenced WPI locations used by the Maritime Bridge Atlas; these are not validated terminals or individual bunkering markets.
World Bank World Development Indicators, country/territory time series, licensed CC BY 4.0. GDP, trade ratios and fuel shares reflect different reporting years. WPI port locations derive from a separately licensed dataset; attribution is in the Charter Atlas.
No economic fact is inferred from an artificial charter or bunker scenario. Country data are checked at build time; the date displayed beside each figure is the source observation year, not today.