Revenues from passenger train operations increased by 6.9% to NKr 6.6bn ($US 1.1bn), while operating profits climbed from NKr 378m in 2012 to NKr 624m last year.

NSB says much of the growth can be attributed to timetabling enhancements and improved services.

"This strong financial performance will allow us to continue investing in the years to come," says NSB executive vice president for passenger services Mr Tom Ingulstad. "With high passenger growth there will be a need for even more new trains in the future."