Each port's decades in the top ten, summed across all three rankings — ship movements, tonnage and value. A single score for staying power, and a bar that shows which metric carried it.
| # | Port | Ships | Ton. | Val. | Total | Composition (of 81) | Breadth |
|---|
Reading it. The four all-rounders — London (a perfect 81), Amsterdam and Hamburg (78), Lisbon (71) — top every metric. Below them the bar turns telling: specialists ride one or two lenses. Marseille scores 30 with zero tonnage (small coasters); Newcastle, Riga and Königsberg are near-pure tonnage (coal, timber, grain); Batavia, Canton, Havana, Surat and Calcutta live almost entirely in the value column. The breadth dots mark how many of the three metrics each port reached — the truest measure of an all-purpose hub.