Monthly Millions Of Net Ton-Miles
1920-01-01 888.000
1920-02-01 836.000
1920-03-01 945.000
1920-04-01 834.000
1920-05-01 867.000
1920-06-01 880.000
1920-07-01 888.000
1920-08-01 834.000
1920-09-01 881.000
1920-10-01 801.000
1920-11-01 767.000
1920-12-01 731.000
1921-01-01 664.000
1921-02-01 618.000
1921-03-01 636.000
1921-04-01 531.000
1921-05-01 424.000
1921-06-01 424.000
1921-07-01 481.000
1921-08-01 595.000
1921-09-01 625.000
1921-10-01 623.000
1921-11-01 623.000
1921-12-01 563.000
1922-01-01 545.000
1922-02-01 568.000
1922-03-01 670.000
1922-04-01 537.000
1922-05-01 642.000
1922-06-01 579.000
1922-07-01 601.000
1922-08-01 635.000
1922-09-01 652.000
1922-10-01 682.000
1922-11-01 683.000
1922-12-01 615.000
1923-01-01 703.000
1923-02-01 668.000
1923-03-01 777.000
1923-04-01 722.000
1923-05-01 772.000
1923-06-01 740.000
1923-07-01 702.000
1923-08-01 715.000
1923-09-01 725.000
1923-10-01 801.000
1923-11-01 764.000
1923-12-01 682.000
1924-01-01 654.000
1924-02-01 779.000
1924-03-01 817.000
1924-04-01 764.000
1924-05-01 834.000
1924-06-01 714.000
1924-07-01 788.000
1924-08-01 719.000
1924-09-01 784.000
1924-10-01 834.000
1924-11-01 764.000
1924-12-01 718.000
1925-01-01 762.000
1925-02-01 726.000
1925-03-01 800.000
1925-04-01 736.000
1925-05-01 775.000
1925-06-01 718.000
1925-07-01 771.000
1925-08-01 696.000
1925-09-01 773.000
1925-10-01 806.000
1925-11-01 749.000
1925-12-01 714.000
1926-01-01 722.000
1926-02-01 741.000
1926-03-01 868.000
1926-04-01 762.000
1926-05-01 385.000
1926-06-01 640.000
1926-07-01 598.000
1926-08-01 584.000
1926-09-01 646.000
1926-10-01 673.000
1926-11-01 654.000
1926-12-01 671.000
1927-01-01 733.000
1927-02-01 736.000
1927-03-01 879.000
1927-04-01 783.000
1927-05-01 845.000
1927-06-01 766.000
1927-07-01 763.000
1927-08-01 767.000
1927-09-01 789.000
1927-10-01 814.000
1927-11-01 804.000
1927-12-01 706.000
1928-01-01 705.000
1928-02-01 746.000
1928-03-01 822.000
1928-04-01 707.000
1928-05-01 794.000
1928-06-01 760.000
1928-07-01 743.000
1928-08-01 747.000
1928-09-01 753.000
1928-10-01 824.000
1928-11-01 788.000
1928-12-01 691.000
1929-01-01 746.000
1929-02-01 664.000
1929-03-01 765.000
1929-04-01 820.000
1929-05-01 829.000
1929-06-01 778.000
1929-07-01 819.000
1929-08-01 794.000
1929-09-01 798.000
1929-10-01 888.000
1929-11-01 829.000
1929-12-01 723.000
1930-01-01 794.000
1930-02-01 738.000
1930-03-01 815.000
1930-04-01 751.000
1930-05-01 815.000
1930-06-01 689.000
1930-07-01 751.000
1930-08-01 673.000
1930-09-01 729.000
1930-10-01 810.000
1930-11-01 704.000
1930-12-01 652.000
1931-01-01 669.000
1931-02-01 620.000
1931-03-01 693.000
1931-04-01 671.000
1931-05-01 656.000
1931-06-01 672.000
1931-07-01 693.000
1931-08-01 615.000
1931-09-01 671.000
1931-10-01 731.000
1931-11-01 671.000
1931-12-01 633.000