Month Passenger-Miles 1920-01-01 1155.00 1920-02-01 1136.00 1920-03-01 1207.00 1920-04-01 1328.00 1920-05-01 1401.00 1920-06-01 1576.00 1920-07-01 1750.00 1920-08-01 1807.00 1920-09-01 1607.00 1920-10-01 1368.00 1920-11-01 1240.00 1920-12-01 1173.00 1921-01-01 1144.00 1921-02-01 1113.00 1921-03-01 1142.00 1921-04-01 1123.00 1921-05-01 1197.00 1921-06-01 1368.00 1921-07-01 1479.00 1921-08-01 1463.00 1921-09-01 1361.00 1921-10-01 1155.00 1921-11-01 1054.00 1921-12-01 1048.00 1922-01-01 978.000 1922-02-01 971.000 1922-03-01 989.000 1922-04-01 1119.00 1922-05-01 1190.00 1922-06-01 1406.00 1922-07-01 1452.00 1922-08-01 1430.00 1922-09-01 1335.00 1922-10-01 1131.00 1922-11-01 1032.00 1922-12-01 1047.00 1923-01-01 982.000 1923-02-01 941.000 1923-03-01 962.000 1923-04-01 1066.00 1923-05-01 1139.00 1923-06-01 1383.00 1923-07-01 1440.00 1923-08-01 1493.00 1923-09-01 1402.00 1923-10-01 1163.00 1923-11-01 1085.00 1923-12-01 1161.00 1924-01-01 1017.00 1924-02-01 1017.00 1924-03-01 1024.00 1924-04-01 1095.00 1924-05-01 1139.00 1924-06-01 1394.00 1924-07-01 1416.00 1924-08-01 1503.00 1924-09-01 1334.00 1924-10-01 1132.00 1924-11-01 1062.00 1924-12-01 1033.00 1925-01-01 1025.00 1925-02-01 1042.00 1925-03-01 1019.00 1925-04-01 1093.00 1925-05-01 1167.00 1925-06-01 1418.00 1925-07-01 1471.00 1925-08-01 1548.00 1925-09-01 1418.00 1925-10-01 1157.00 1925-11-01 1071.00 1925-12-01 1084.00 1926-01-01 1056.00 1926-02-01 1047.00 1926-03-01 998.000 1926-04-01 1076.00 1926-05-01 1167.00 1926-06-01 1384.00 1926-07-01 1454.00 1926-08-01 1479.00 1926-09-01 1381.00 1926-10-01 1142.00 1926-11-01 1037.00 1926-12-01 1053.00 1927-01-01 1030.00 1927-02-01 1047.00 1927-03-01 998.000 1927-04-01 1083.00 1927-05-01 1153.00 1927-06-01 1331.00 1927-07-01 1421.00 1927-08-01 1411.00 1927-09-01 1345.00 1927-10-01 1118.00 1927-11-01 1037.00 1927-12-01 1024.00 1928-01-01 1011.00 1928-02-01 1005.00 1928-03-01 974.000 1928-04-01 1058.00 1928-05-01 1081.00 1928-06-01 1328.00 1928-07-01 1369.00 1928-08-01 1383.00 1928-09-01 1309.00 1928-10-01 1094.00 1928-11-01 1005.00 1928-12-01 1041.00 1929-01-01 990.000 1929-02-01 1016.00 1929-03-01 1034.00 1929-04-01 1059.00 1929-05-01 1095.00 1929-06-01 1337.00 1929-07-01 1350.00 1929-08-01 1416.00 1929-09-01 1265.00 1929-10-01 1043.00 1929-11-01 976.000 1929-12-01 1009.00 1930-01-01 940.000 1930-02-01 995.000 1930-03-01 931.000 1930-04-01 990.000 1930-05-01 1037.00 1930-06-01 1241.00 1930-07-01 1246.00 1930-08-01 1277.00 1930-09-01 1157.00 1930-10-01 968.000 1930-11-01 911.000 1930-12-01 904.000 1931-01-01 883.000 1931-02-01 928.000 1931-03-01 856.000 1931-04-01 960.000 1931-05-01 992.000 1931-06-01 1160.00 1931-07-01 1179.00 1931-08-01 1161.00 1931-09-01 1100.00 1931-10-01 882.000 1931-11-01 854.000 1931-12-01 865.000 1932-01-01 815.000 1932-02-01 822.000 1932-03-01 779.000 1932-04-01 807.000 1932-05-01 891.000 1932-06-01 987.000 1932-07-01 1063.00 1932-08-01 1044.00 1932-09-01 1046.00 1932-10-01 817.000 1932-11-01 760.000 1932-12-01 793.000 1933-01-01 727.000 1933-02-01 712.000 1933-03-01 660.000 1933-04-01 775.000 1933-05-01 836.000 1933-06-01 1078.00 1933-07-01 1157.00 1933-08-01 1188.00 1933-09-01 1186.00 1933-10-01 1034.00 1933-11-01 833.000 1933-12-01 909.000 1934-01-01 835.000 1934-02-01 823.000 1934-03-01 834.000 1934-04-01 933.000 1934-05-01 908.000 1934-06-01 1134.00 1934-07-01 1207.00 1934-08-01 1246.00 1934-09-01 1155.00 1934-10-01 1015.00 1934-11-01 871.000 1934-12-01 943.000 1935-01-01 859.000 1935-02-01 888.000 1935-03-01 855.000 1935-04-01 914.000 1935-05-01 897.000 1935-06-01 1081.00 1935-07-01 1136.00 1935-08-01 1208.00 1935-09-01 1111.00 1935-10-01 947.000 1935-11-01 925.000 1935-12-01 965.000 1936-01-01 851.000 1936-02-01 821.000 1936-03-01 852.000 1936-04-01 904.000 1936-05-01 929.000 1936-06-01 1181.00 1936-07-01 1283.00 1936-08-01 1321.00 1936-09-01 1192.00 1936-10-01 1043.00 1936-11-01 992.000 1936-12-01 1024.00 1937-01-01 968.000 1937-02-01 971.000 1937-03-01 966.000 1937-04-01 998.000 1937-05-01 1048.00 1937-06-01 1227.00 1937-07-01 1321.00 1937-08-01 1327.00 1937-09-01 1222.00 1937-10-01 1063.00 1937-11-01 1004.00 1937-12-01 1013.00 1938-01-01 979.000 1938-02-01 944.000 1938-03-01 891.000 1938-04-01 973.000 1938-05-01 995.000 1938-06-01 1131.00 1938-07-01 1223.00 1938-08-01 1165.00 1938-09-01 1087.00 1938-10-01 975.000 1938-11-01 914.000 1938-12-01 968.000 1939-01-01 938.000 1939-02-01 906.000 1939-03-01 875.000 1939-04-01 962.000 1939-05-01 997.000 1939-06-01 1218.00 1939-07-01 1314.00 1939-08-01 1283.00 1939-09-01 1226.00 1939-10-01 1060.00 1939-11-01 924.000 1939-12-01 1012.00 1940-01-01 911.000 1940-02-01 933.000 1940-03-01 945.000 1940-04-01 958.000 1940-05-01 990.000 1940-06-01 1225.00 1940-07-01 1262.00 1940-08-01 1366.00 1940-09-01 1239.00 1940-10-01 1077.00 1940-11-01 994.000 1940-12-01 1082.00 1941-01-01 1053.00 1941-02-01 1084.00 1941-03-01 1076.00 1941-04-01 1149.00 1941-05-01 1149.00 1941-06-01 1382.00 1941-07-01 1438.00 1941-08-01 1528.00 1941-09-01 1366.00 1941-10-01 1258.00 1941-11-01 1209.00 1941-12-01 1331.00 1942-01-01 1319.00 1942-02-01 1411.00 1942-03-01 1402.00 1942-04-01 1624.00 1942-05-01 1805.00 1942-06-01 2042.00