Month	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