Month	Ton-Miles
1920-01-01	654.000
1920-02-01	675.000
1920-03-01	703.000
1920-04-01	647.000
1920-05-01	725.000
1920-06-01	735.000
1920-07-01	745.000
1920-08-01	762.000
1920-09-01	746.000
1920-10-01	737.000
1920-11-01	691.000
1920-12-01	657.000
1921-01-01	617.000
1921-02-01	617.000
1921-03-01	627.000
1921-04-01	638.000
1921-05-01	674.000
1921-06-01	670.000
1921-07-01	659.000
1921-08-01	671.000
1921-09-01	679.000
1921-10-01	704.000
1921-11-01	633.000
1921-12-01	608.000
1922-01-01	632.000
1922-02-01	674.000
1922-03-01	690.000
1922-04-01	614.000
1922-05-01	635.000
1922-06-01	654.000
1922-07-01	644.000
1922-08-01	689.000
1922-09-01	721.000
1922-10-01	731.000
1922-11-01	719.000
1922-12-01	681.000
1923-01-01	692.000
1923-02-01	672.000
1923-03-01	709.000
1923-04-01	722.000
1923-05-01	725.000
1923-06-01	731.000
1923-07-01	732.000
1923-08-01	745.000
1923-09-01	733.000
1923-10-01	722.000
1923-11-01	701.000
1923-12-01	669.000
1924-01-01	666.000
1924-02-01	706.000
1924-03-01	703.000
1924-04-01	682.000
1924-05-01	704.000
1924-06-01	706.000
1924-07-01	704.000
1924-08-01	747.000
1924-09-01	759.000
1924-10-01	771.000
1924-11-01	742.000
1924-12-01	684.000
1925-01-01	709.000
1925-02-01	722.000
1925-03-01	720.000
1925-04-01	712.000
1925-05-01	755.000
1925-06-01	744.000
1925-07-01	758.000
1925-08-01	796.000
1925-09-01	777.000
1925-10-01	760.000
1925-11-01	755.000
1925-12-01	716.000
1926-01-01	720.000
1926-02-01	736.000
1926-03-01	728.000
1926-04-01	725.000
1926-05-01	771.000
1926-06-01	780.000
1926-07-01	793.000
1926-08-01	820.000
1926-09-01	816.000
1926-10-01	829.000
1926-11-01	793.000
1926-12-01	743.000
1927-01-01	748.000
1927-02-01	772.000
1927-03-01	785.000
1927-04-01	754.000
1927-05-01	787.000
1927-06-01	785.000
1927-07-01	781.000
1927-08-01	813.000
1927-09-01	819.000
1927-10-01	805.000
1927-11-01	754.000
1927-12-01	718.000
1928-01-01	747.000
1928-02-01	758.000
1928-03-01	775.000
1928-04-01	758.000
1928-05-01	784.000
1928-06-01	784.000
1928-07-01	794.000
1928-08-01	822.000
1928-09-01	842.000
1928-10-01	842.000
1928-11-01	813.000
1928-12-01	767.000
1929-01-01	769.000
1929-02-01	779.000
1929-03-01	777.000
1929-04-01	776.000
1929-05-01	813.000
1929-06-01	827.000
1929-07-01	818.000
1929-08-01	855.000
1929-09-01	856.000
1929-10-01	843.000
1929-11-01	773.000
1929-12-01	755.000
1930-01-01	757.000
1930-02-01	782.000
1930-03-01	761.000
1930-04-01	771.000
1930-05-01	793.000
1930-06-01	798.000
1930-07-01	798.000
1930-08-01	835.000
1930-09-01	817.000
1930-10-01	813.000
1930-11-01	762.000
1930-12-01	720.000
1931-01-01	755.000
1931-02-01	747.000
1931-03-01	741.000
1931-04-01	727.000
1931-05-01	738.000
1931-06-01	720.000
1931-07-01	740.000
1931-08-01	753.000
1931-09-01	744.000
1931-10-01	760.000
1931-11-01	704.000
1931-12-01	659.000
1932-01-01	677.000
1932-02-01	676.000
1932-03-01	676.000
1932-04-01	653.000
1932-05-01	623.000
1932-06-01	608.000
1932-07-01	622.000
1932-08-01	650.000
1932-09-01	706.000
1932-10-01	725.000
1932-11-01	673.000
1932-12-01	650.000
1933-01-01	648.000
1933-02-01	659.000
1933-03-01	636.000
1933-04-01	658.000
1933-05-01	671.000
1933-06-01	718.000
1933-07-01	755.000
1933-08-01	756.000
1933-09-01	758.000
1933-10-01	724.000
1933-11-01	704.000
1933-12-01	676.000
1934-01-01	692.000
1934-02-01	713.000
1934-03-01	739.000
1934-04-01	686.000
1934-05-01	707.000
1934-06-01	716.000
1934-07-01	688.000
1934-08-01	701.000
1934-09-01	729.000
1934-10-01	713.000
1934-11-01	702.000
1934-12-01	684.000
1935-01-01	706.000
1935-02-01	729.000
1935-03-01	756.000
1935-04-01	678.000
1935-05-01	708.000
1935-06-01	761.000
1935-07-01	684.000
1935-08-01	742.000
1935-09-01	782.000
1935-10-01	782.000
1935-11-01	749.000
1935-12-01	716.000
1936-01-01	723.000
1936-02-01	755.000
1936-03-01	721.000
1936-04-01	740.000
1936-05-01	766.000
1936-06-01	755.000
1936-07-01	775.000
1936-08-01	800.000
1936-09-01	823.000
1936-10-01	833.000
1936-11-01	803.000
1936-12-01	774.000
1937-01-01	768.000
1937-02-01	797.000
1937-03-01	818.000
1937-04-01	775.000
1937-05-01	804.000
1937-06-01	784.000
1937-07-01	806.000
1937-08-01	822.000
1937-09-01	851.000
1937-10-01	832.000
1937-11-01	752.000
1937-12-01	727.000
1938-01-01	736.000
1938-02-01	720.000
1938-03-01	737.000
1938-04-01	692.000
1938-05-01	716.000
1938-06-01	729.000
1938-07-01	772.000
1938-08-01	780.000
1938-09-01	825.000
1938-10-01	834.000
1938-11-01	782.000
1938-12-01	763.000
1939-01-01	775.000
1939-02-01	764.000
1939-03-01	773.000
1939-04-01	696.000
1939-05-01	724.000
1939-06-01	796.000
1939-07-01	822.000
1939-08-01	843.000
1939-09-01	915.000
1939-10-01	919.000
1939-11-01	871.000
1939-12-01	813.000
1940-01-01	793.000
1940-02-01	793.000
1940-03-01	804.000
1940-04-01	804.000
1940-05-01	851.000
1940-06-01	875.000
1940-07-01	867.000
1940-08-01	904.000
1940-09-01	925.000
1940-10-01	881.000
1940-11-01	862.000
1940-12-01	825.000
1941-01-01	840.000
1941-02-01	853.000
1941-03-01	891.000
1941-04-01	767.000
1941-05-01	933.000
1941-06-01	952.000
1941-07-01	948.000
1941-08-01	990.000
1941-09-01	973.000
1941-10-01	960.000
1941-11-01	932.000
1941-12-01	897.000
1942-01-01	909.000
1942-02-01	928.000
1942-03-01	968.000
1942-04-01	1006.00
1942-05-01	1046.00
1942-06-01	1059.00
1942-07-01	1074.00
1942-08-01	1086.00
1942-09-01	1088.00
1942-10-01	1101.00
1942-11-01	1081.00
1942-12-01	1033.00
1943-01-01	1032.00
1943-02-01	1085.00
1943-03-01	1086.00
1943-04-01	1094.00
1943-05-01	1128.00
1943-06-01	1089.00
1943-07-01	1157.00
1943-08-01	1170.00