Month Millions Of Miles 1915-01-01 609.000 1915-02-01 556.000 1915-03-01 651.000 1915-04-01 653.000 1915-05-01 675.000 1915-06-01 815.000 1915-07-01 956.000 1915-08-01 982.000 1915-09-01 897.000 1915-10-01 765.000 1915-11-01 683.000 1915-12-01 683.000 1916-01-01 675.000 1916-02-01 632.000 1916-03-01 696.000 1916-04-01 691.000 1916-05-01 707.000 1916-06-01 845.000 1916-07-01 891.000 1916-08-01 906.000 1916-09-01 880.000 1916-10-01 844.000 1916-11-01 702.000 1916-12-01 816.000 1917-01-01 855.000 1917-02-01 768.000 1917-03-01 855.000 1917-04-01 847.000 1917-05-01 830.000 1917-06-01 916.000 1917-07-01 933.000 1917-08-01 1076.00 1917-09-01 1081.00 1917-10-01 1025.00 1917-11-01 889.000 1917-12-01 997.000 1918-01-01 836.000 1918-02-01 776.000 1918-03-01 968.000 1918-04-01 967.000 1918-05-01 1035.00 1918-06-01 932.000 1918-07-01 869.000 1918-08-01 949.000 1918-09-01 950.000 1918-10-01 724.000 1918-11-01 694.000 1918-12-01 979.000 1919-01-01 993.000 1919-02-01 924.000 1919-03-01 1039.00 1919-04-01 1047.00 1919-05-01 1126.00 1919-06-01 1269.00 1919-07-01 1310.00 1919-08-01 1379.00 1919-09-01 1331.00 1919-10-01 1159.00 1919-11-01 1049.00 1919-12-01 1094.00 1920-01-01 1141.00 1920-02-01 1021.00 1920-03-01 1156.00 1920-04-01 1174.00 1920-05-01 1231.00 1920-06-01 1334.00 1920-07-01 1413.00 1920-08-01 1520.00 1920-09-01 1262.00 1920-10-01 1093.00 1920-11-01 980.000 1920-12-01 1009.00 1921-01-01 1039.00 1921-02-01 862.000 1921-03-01 951.000 1921-04-01 897.000 1921-05-01 889.000 1921-06-01 1023.00 1921-07-01 1041.00 1921-08-01 1048.00 1921-09-01 1042.00 1921-10-01 917.000 1921-11-01 775.000 1921-12-01 811.000 1922-01-01 931.000 1922-02-01 782.000 1922-03-01 872.000 1922-04-01 904.000 1922-05-01 944.000 1922-06-01 1156.00 1922-07-01 1064.00 1922-08-01 1101.00 1922-09-01 1108.00 1922-10-01 1024.00 1922-11-01 884.000 1922-12-01 989.000 1923-01-01 1025.00 1923-02-01 876.000 1923-03-01 989.000 1923-04-01 991.000 1923-05-01 1018.00 1923-06-01 1236.00 1923-07-01 1206.00 1923-08-01 1292.00 1923-09-01 1261.00 1923-10-01 1108.00 1923-11-01 936.000 1923-12-01 1044.00 1924-01-01 1069.00 1924-02-01 959.000 1924-03-01 1015.00 1924-04-01 1016.00 1924-05-01 1037.00 1924-06-01 1243.00 1924-07-01 1179.00 1924-08-01 1316.00 1924-09-01 1228.00 1924-10-01 1074.00 1924-11-01 923.000 1924-12-01 1023.00 1925-01-01 1116.00 1925-02-01 976.000 1925-03-01 1054.00 1925-04-01 1041.00 1925-05-01 1091.00 1925-06-01 1285.00 1925-07-01 1294.00 1925-08-01 1420.00 1925-09-01 1344.00 1925-10-01 1219.00 1925-11-01 1046.00 1925-12-01 1130.00 1926-01-01 1239.00 1926-02-01 1053.00 1926-03-01 1107.00 1926-04-01 1110.00 1926-05-01 1137.00 1926-06-01 1351.00 1926-07-01 1324.00 1926-08-01 1395.00 1926-09-01 1362.00 1926-10-01 1199.00 1926-11-01 1018.00 1926-12-01 1114.00 1927-01-01 1222.00 1927-02-01 1039.00 1927-03-01 1111.00 1927-04-01 1089.00 1927-05-01 1101.00 1927-06-01 1292.00 1927-07-01 1308.00 1927-08-01 1362.00 1927-09-01 1341.00 1927-10-01 1149.00 1927-11-01 983.000 1927-12-01 1102.00 1928-01-01 1192.00 1928-02-01 1055.00 1928-03-01 1094.00 1928-04-01 1091.00 1928-05-01 1075.00 1928-06-01 1322.00 1928-07-01 1273.00 1928-08-01 1338.00 1928-09-01 1292.00 1928-10-01 1141.00 1928-11-01 954.000 1928-12-01 1111.00 1929-01-01 1201.00 1929-02-01 1085.00 1929-03-01 1167.00 1929-04-01 1073.00 1929-05-01 1083.00 1929-06-01 1321.00 1929-07-01 1266.00 1929-08-01 1373.00 1929-09-01 1302.00 1929-10-01 1138.00 1929-11-01 945.000 1929-12-01 1105.00 1930-01-01 1186.00 1930-02-01 1026.00 1930-03-01 1080.00 1930-04-01 1011.00 1930-05-01 1005.00 1930-06-01 1195.00 1930-07-01 1094.00 1930-08-01 1175.00 1930-09-01 1075.00 1930-10-01 962.000 1930-11-01 812.000 1930-12-01 895.000 1931-01-01 966.000 1931-02-01 829.000 1931-03-01 870.000 1931-04-01 845.000 1931-05-01 813.000 1931-06-01 919.000 1931-07-01 868.000 1931-08-01 899.000 1931-09-01 856.000 1931-10-01 715.000 1931-11-01 622.000 1931-12-01 689.000 1932-01-01 705.000 1932-02-01 598.000 1932-03-01 596.000 1932-04-01 552.000 1932-05-01 545.000 1932-06-01 592.000 1932-07-01 561.000 1932-08-01 571.000 1932-09-01 584.000 1932-10-01 500.000 1932-11-01 437.000 1932-12-01 516.000 1933-01-01 509.000 1933-02-01 415.000 1933-03-01 388.000 1933-04-01 414.000 1933-05-01 421.000 1933-06-01 625.000 1933-07-01 550.000 1933-08-01 593.000 1933-09-01 639.000 1933-10-01 596.000 1933-11-01 435.000 1933-12-01 557.000 1934-01-01 603.000 1934-02-01 537.000 1934-03-01 602.000 1934-04-01 581.000 1934-05-01 532.000 1934-06-01 597.000 1934-07-01 581.000 1934-08-01 609.000 1934-09-01 609.000 1934-10-01 576.000 1934-11-01 476.000 1934-12-01 589.000 1935-01-01 639.000 1935-02-01 553.000 1935-03-01 588.000 1935-04-01 536.000 1935-05-01 529.000 1935-06-01 617.000 1935-07-01 618.000 1935-08-01 653.000 1935-09-01 635.000 1935-10-01 611.000 1935-11-01 540.000 1935-12-01 628.000 1936-01-01 750.000 1936-02-01 656.000 1936-03-01 665.000 1936-04-01 649.000 1936-05-01 599.000 1936-06-01 707.000 1936-07-01 755.000 1936-08-01 764.000 1936-09-01 744.000 1936-10-01 719.000 1936-11-01 615.000 1936-12-01 731.000 1937-01-01 853.000 1937-02-01 737.000 1937-03-01 796.000 1937-04-01 744.000 1937-05-01 686.000 1937-06-01 768.000 1937-07-01 805.000 1937-08-01 837.000 1937-09-01 804.000 1937-10-01 780.000 1937-11-01 637.000 1937-12-01 724.000 1938-01-01 830.000 1938-02-01 683.000 1938-03-01 703.000 1938-04-01 665.000 1938-05-01 605.000 1938-06-01 721.000 1938-07-01 739.000 1938-08-01 684.000 1938-09-01 716.000 1938-10-01 652.000 1938-11-01 585.000 1938-12-01 687.000 1939-01-01 793.000 1939-02-01 655.000 1939-03-01 715.000 1939-04-01 684.000 1939-05-01 632.000 1939-06-01 770.000 1939-07-01 802.000 1939-08-01 765.000 1939-09-01 736.000 1939-10-01 696.000 1939-11-01 562.000 1939-12-01 675.000 1940-01-01 795.000 1940-02-01 672.000 1940-03-01 735.000 1940-04-01 636.000 1940-05-01 571.000 1940-06-01 685.000 1940-07-01 702.000 1940-08-01 718.000 1940-09-01 702.000 1940-10-01 685.000 1940-11-01 578.000 1940-12-01 734.000 1941-01-01 880.000 1941-02-01 791.000 1941-03-01 926.000 1941-04-01 766.000 1941-05-01 714.000 1941-06-01 898.000 1941-07-01 826.000 1941-08-01 850.000 1941-09-01 797.000 1941-10-01 841.000 1941-11-01 764.000 1941-12-01 1018.00 1942-01-01 1274.00 1942-02-01 1208.00 1942-03-01 1289.00 1942-04-01 1380.00 1942-05-01 1446.00 1942-06-01 1496.00 1942-07-01 1472.00 1942-08-01 1843.00 1942-09-01 1925.00 1942-10-01 1962.00 1942-11-01 1907.00 1942-12-01 1870.00 1943-01-01 2036.00 1943-02-01 1850.00 1943-03-01 2091.00 1943-04-01 2126.00 1943-05-01 2105.00 1943-06-01 2186.00 1943-07-01 2192.00 1943-08-01 2364.00