Monthly Million Net Ton-Miles
1931-01-01 1464.00
1931-02-01 1336.00
1931-03-01 1448.00
1931-04-01 1315.00
1931-05-01 1384.00
1931-06-01 1271.00
1931-07-01 1293.00
1931-08-01 1316.00
1931-09-01 1365.00
1931-10-01 1420.00
1931-11-01 1370.00
1931-12-01 1332.00
1932-01-01 1346.00
1932-02-01 1315.00
1932-03-01 1349.00
1932-04-01 1229.00
1932-05-01 1222.00
1932-06-01 1167.00
1932-07-01 1140.00
1932-08-01 1158.00
1932-09-01 1173.00
1932-10-01 1280.00
1932-11-01 1284.00
1932-12-01 1202.00
1933-01-01 1263.00
1933-02-01 1207.00
1933-03-01 1305.00
1933-04-01 1137.00
1933-05-01 1207.00
1933-06-01 1129.00
1933-07-01 1182.00
1933-08-01 1235.00
1933-09-01 1255.00
1933-10-01 1351.00
1933-11-01 1395.00
1933-12-01 1416.00
1934-01-01 1454.00
1934-02-01 1349.00
1934-03-01 1464.00
1934-04-01 1304.00
1934-05-01 1307.00
1934-06-01 1222.00
1934-07-01 1240.00
1934-08-01 1319.00
1934-09-01 1363.00
1934-10-01 1412.00
1934-11-01 1434.00
1934-12-01 1365.00
1935-01-01 1419.00
1935-02-01 1320.00
1935-03-01 1434.00
1935-04-01 1291.00
1935-05-01 1287.00
1935-06-01 1275.00
1935-07-01 1256.00
1935-08-01 1321.00
1935-09-01 1354.00
1935-10-01 1488.00
1935-11-01 1520.00
1935-12-01 1454.00
1936-01-01 1507.00
1936-02-01 1469.00
1936-03-01 1508.00
1936-04-01 1372.00
1936-05-01 1427.00
1936-06-01 1341.00
1936-07-01 1350.00
1936-08-01 1434.00
1936-09-01 1425.00
1936-10-01 1550.00
1936-11-01 1486.00
1936-12-01 1551.00
1937-01-01 1528.00
1937-02-01 1454.00
1937-03-01 1620.00
1937-04-01 1508.00
1937-05-01 1549.00
1937-06-01 1485.00
1937-07-01 1423.00
1937-08-01 1513.00
1937-09-01 1547.00
1937-10-01 1621.00
1937-11-01 1583.00
1937-12-01 1609.00
1938-01-01 1586.00
1938-02-01 1482.00
1938-03-01 1560.00
1938-04-01 1367.00
1938-05-01 1342.00
1938-06-01 1273.00
1938-07-01 1227.00
1938-08-01 1291.00
1938-09-01 1326.00
1938-10-01 1484.00
1938-11-01 1380.00
1938-12-01 1428.00
1939-01-01 1444.00
1939-02-01 1402.00
1939-03-01 1544.00
1939-04-01 1457.00