Month	Million Net Ton-Miles
1920-01-01	1673.00
1920-02-01	1577.00
1920-03-01	1811.00
1920-04-01	1575.00
1920-05-01	1646.00
1920-06-01	1690.00
1920-07-01	1713.00
1920-08-01	1576.00
1920-09-01	1685.00
1920-10-01	1227.00
1920-11-01	1460.00
1920-12-01	1547.00
1921-01-01	1440.00
1921-02-01	1276.00
1921-03-01	1273.00
1921-04-01	597.000
1921-05-01	498.000
1921-06-01	521.000
1921-07-01	1088.00
1921-08-01	1309.00
1921-09-01	1296.00
1921-10-01	1324.00
1921-11-01	1368.00
1921-12-01	1305.00
1922-01-01	1320.00
1922-02-01	1363.00
1922-03-01	1527.00
1922-04-01	1236.00
1922-05-01	1378.00
1922-06-01	1160.00
1922-07-01	1367.00
1922-08-01	1454.00
1922-09-01	1463.00
1922-10-01	1544.00
1922-11-01	1568.00
1922-12-01	1429.00
1923-01-01	1616.00
1923-02-01	1505.00
1923-03-01	1695.00
1923-04-01	1530.00
1923-05-01	1598.00
1923-06-01	1606.00
1923-07-01	1473.00
1923-08-01	1492.00
1923-09-01	1557.00
1923-10-01	1732.00
1923-11-01	1659.00
1923-12-01	1511.00
1924-01-01	1434.00
1924-02-01	1714.00
1924-03-01	1785.00
1924-04-01	1605.00
1924-05-01	1678.00
1924-06-01	1388.00
1924-07-01	1580.00
1924-08-01	1479.00
1924-09-01	1627.00
1924-10-01	1689.00
1924-11-01	1565.00
1924-12-01	1533.00
1925-01-01	1620.00
1925-02-01	1529.00
1925-03-01	1646.00
1925-04-01	1473.00
1925-05-01	1511.00
1925-06-01	1369.00
1925-07-01	1665.00
1925-08-01	1339.00
1925-09-01	1489.00
1925-10-01	1610.00
1925-11-01	1524.00
1925-12-01	1570.00
1926-01-01	1601.00
1926-02-01	1567.00
1926-03-01	1748.00
1926-04-01	1559.00
1926-05-01	452.000
1926-06-01	733.000
1926-07-01	751.000
1926-08-01	783.000
1926-09-01	910.000
1926-10-01	1144.00
1926-11-01	1309.00
1926-12-01	1495.00
1927-01-01	1654.00
1927-02-01	1570.00
1927-03-01	1744.00
1927-04-01	1494.00
1927-05-01	1596.00
1927-06-01	1501.00
1927-07-01	1548.00
1927-08-01	1526.00
1927-09-01	1580.00
1927-10-01	1584.00
1927-11-01	1560.00
1927-12-01	1502.00
1928-01-01	1506.00
1928-02-01	1484.00
1928-03-01	1631.00
1928-04-01	1364.00
1928-05-01	1458.00
1928-06-01	1419.00
1928-07-01	1402.00
1928-08-01	1451.00
1928-09-01	1483.00
1928-10-01	1584.00
1928-11-01	1524.00
1928-12-01	1440.00
1929-01-01	1590.00
1929-02-01	1476.00
1929-03-01	1648.00
1929-04-01	1536.00
1929-05-01	1552.00
1929-06-01	1476.00
1929-07-01	1580.00
1929-08-01	1572.00
1929-09-01	1565.00
1929-10-01	1695.00
1929-11-01	1658.00
1929-12-01	1519.00
1930-01-01	1636.00
1930-02-01	1529.00
1930-03-01	1611.00
1930-04-01	1438.00
1930-05-01	1539.00
1930-06-01	1277.00
1930-07-01	1448.00
1930-08-01	1378.00
1930-09-01	1454.00
1930-10-01	1560.00
1930-11-01	1466.00
1930-12-01	1470.00
1931-01-01	1458.00
1931-02-01	1336.00
1931-03-01	1426.00
1931-04-01	1337.00
1931-05-01	1288.00
1931-06-01	1337.00
1931-07-01	1359.00
1931-08-01	1265.00
1931-09-01	1367.00
1931-10-01	1446.00
1931-11-01	1337.00
1931-12-01	1378.00