;2017;Change in per cent;Change in per cent; 2016 - 2017;2012 - 2017; Norwegian registers;;;; Port calls;64621;18.9;23.0; Arrived gross tonnage;908930740;10.0;14.6; Active vessels;988;4.2;7.7; Gross tonnage, active vessels;17420523;1.9;10.3; Norwegian controlled and registered abroad;;;; Port calls;60495;15.0;36.5; Arrived gross tonnage;1264342322;42.8;87.6; Active vessels;1014;5.1;40.1; Gross tonnage, active vessels;31290003;31.9;96.5;