Major ports are ports having an annual throughput of goods of about 1 million tonnes or more. For the ports of: Helsingør, Nyborg, Korsør and Frederikshavn the statistics only cover transport of goods by ferry. For the Port of Kalundborg the same is valid for the period 1997-2003.".." or "0" for all data concerning the same year for a port indicates that the port is not considered a major port that year.