Month	Millions Of Locomotive- Miles
1920-01-01	58.0000
1920-02-01	52.7000
1920-03-01	58.2000
1920-04-01	47.4000
1920-05-01	56.4000
1920-06-01	56.1000
1920-07-01	58.5000
1920-08-01	60.4000
1920-09-01	59.0000
1920-10-01	62.2000
1920-11-01	58.2000
1920-12-01	56.9000
1921-01-01	52.0000
1921-02-01	43.3000
1921-03-01	45.7000
1921-04-01	42.9000
1921-05-01	44.9000
1921-06-01	44.9000
1921-07-01	45.9000
1921-08-01	48.2000
1921-09-01	48.4000
1921-10-01	55.7000
1921-11-01	49.2000
1921-12-01	44.9000
1922-01-01	45.9000
1922-02-01	45.3000
1922-03-01	51.3000
1922-04-01	42.9000
1922-05-01	46.8000
1922-06-01	47.4000
1922-07-01	44.7000
1922-08-01	47.0000
1922-09-01	50.8000
1922-10-01	57.6000
1922-11-01	57.0000
1922-12-01	57.4000
1923-01-01	58.8000
1923-02-01	52.4000
1923-03-01	59.7000
1923-04-01	57.3000
1923-05-01	58.7000
1923-06-01	55.9000
1923-07-01	56.6000
1923-08-01	58.0000
1923-09-01	57.7000
1923-10-01	62.6000
1923-11-01	58.2000
1923-12-01	53.5000
1924-01-01	55.4000
1924-02-01	54.5000
1924-03-01	55.4000
1924-04-01	49.7000
1924-05-01	51.3000
1924-06-01	48.1000
1924-07-01	50.1000
1924-08-01	52.0000
1924-09-01	55.0000
1924-10-01	59.8000
1924-11-01	54.7000
1924-12-01	54.7000
1925-01-01	55.9000
1925-02-01	49.8000
1925-03-01	52.4000
1925-04-01	50.2000
1925-05-01	52.6000
1925-06-01	51.4000
1925-07-01	53.6000
1925-08-01	56.2000
1925-09-01	57.0000
1925-10-01	62.2000
1925-11-01	57.9000
1925-12-01	56.6000
1926-01-01	56.1000
1926-02-01	51.8000
1926-03-01	57.0000
1926-04-01	53.4000
1926-05-01	55.2000
1926-06-01	53.8000
1926-07-01	56.3000
1926-08-01	57.1000
1926-09-01	58.4000
1926-10-01	62.6000
1926-11-01	58.7000
1926-12-01	58.1000
1927-01-01	56.4000
1927-02-01	51.8000
1927-03-01	57.1000
1927-04-01	52.7000
1927-05-01	54.6000
1927-06-01	52.5000
1927-07-01	52.6000
1927-08-01	55.4000
1927-09-01	56.4000
1927-10-01	60.9000
1927-11-01	52.8000
1927-12-01	51.6000
1928-01-01	52.1000
1928-02-01	50.5000
1928-03-01	54.7000
1928-04-01	50.8000
1928-05-01	53.8000
1928-06-01	51.0000
1928-07-01	53.0000
1928-08-01	55.4000
1928-09-01	56.0000
1928-10-01	61.8000
1928-11-01	55.6000
1928-12-01	52.8000
1929-01-01	54.9000
1929-02-01	52.8000
1929-03-01	55.6000
1929-04-01	53.0000
1929-05-01	55.2000
1929-06-01	52.8000
1929-07-01	55.0000
1929-08-01	56.5000
1929-09-01	55.6000
1929-10-01	61.2000
1929-11-01	53.7000
1929-12-01	51.2000
1930-01-01	52.1000
1930-02-01	47.0000
1930-03-01	49.6000
1930-04-01	48.4000
1930-05-01	49.3000
1930-06-01	46.0000
1930-07-01	47.6000
1930-08-01	47.8000
1930-09-01	47.4000
1930-10-01	51.7000
1930-11-01	45.1000
1930-12-01	42.7000
1931-01-01	42.6000
1931-02-01	38.5000
1931-03-01	43.0000
1931-04-01	41.9000
1931-05-01	43.2000
1931-06-01	41.6000
1931-07-01	43.4000
1931-08-01	41.3000
1931-09-01	39.6000
1931-10-01	42.7000
1931-11-01	37.6000
1931-12-01	36.2000
1932-01-01	35.6000
1932-02-01	33.7000
1932-03-01	36.8000
1932-04-01	34.3000
1932-05-01	33.4000
1932-06-01	32.1000
1932-07-01	32.1000
1932-08-01	32.3000
1932-09-01	34.0000
1932-10-01	38.5000
1932-11-01	34.1000
1932-12-01	34.2000
1933-01-01	32.4000
1933-02-01	30.6000
1933-03-01	32.0000
1933-04-01	31.8000
1933-05-01	34.2000
1933-06-01	35.0000
1933-07-01	37.2000
1933-08-01	37.1000
1933-09-01	36.7000
1933-10-01	38.7000
1933-11-01	36.0000
1933-12-01	34.4000
1934-01-01	36.4000
1934-02-01	34.6000
1934-03-01	40.1000
1934-04-01	36.1000
1934-05-01	37.8000
1934-06-01	37.3000
1934-07-01	37.2000
1934-08-01	38.2000
1934-09-01	37.6000
1934-10-01	39.2000
1934-11-01	35.7000
1934-12-01	35.7000
1935-01-01	37.8000
1935-02-01	35.4000
1935-03-01	39.1000
1935-04-01	36.7000
1935-05-01	37.1000
1935-06-01	36.5000
1935-07-01	36.0000
1935-08-01	37.2000
1935-09-01	38.0000
1935-10-01	42.9000
1935-11-01	39.3000
1935-12-01	39.2000
1936-01-01	41.5000
1936-02-01	42.0000
1936-03-01	41.8000
1936-04-01	40.9000
1936-05-01	41.9000
1936-06-01	40.8000
1936-07-01	43.1000
1936-08-01	43.1000
1936-09-01	43.2000
1936-10-01	48.1000
1936-11-01	45.5000
1936-12-01	47.4000
1937-01-01	46.7000
1937-02-01	43.9000
1937-03-01	48.5000
1937-04-01	44.9000
1937-05-01	45.7000
1937-06-01	43.7000
1937-07-01	45.1000
1937-08-01	44.0000
1937-09-01	44.1000
1937-10-01	47.6000
1937-11-01	41.4000
1937-12-01	40.3000
1938-01-01	38.3000
1938-02-01	34.3000
1938-03-01	37.7000
1938-04-01	35.1000
1938-05-01	35.3000
1938-06-01	35.0000
1938-07-01	36.5000
1938-08-01	37.6000
1938-09-01	38.0000
1938-10-01	42.4000
1938-11-01	39.0000
1938-12-01	39.6000
1939-01-01	39.0000
1939-02-01	36.0000
1939-03-01	40.0000
1939-04-01	36.9000
1939-05-01	38.0000
1939-06-01	38.4000
1939-07-01	39.0000
1939-08-01	40.0000
1939-09-01	42.8000
1939-10-01	47.3000
1939-11-01	43.6000
1939-12-01	41.7000
1940-01-01	44.4000
1940-02-01	40.3000
1940-03-01	41.7000
1940-04-01	40.0000
1940-05-01	41.9000
1940-06-01	40.7000
1940-07-01	42.0000
1940-08-01	43.6000
1940-09-01	43.4000
1940-10-01	47.4000
1940-11-01	45.1000
1940-12-01	45.7000
1941-01-01	46.5000
1941-02-01	43.4000
1941-03-01	49.4000
1941-04-01	44.4000
1941-05-01	50.6000
1941-06-01	50.4000
1941-07-01	52.8000
1941-08-01	54.2000
1941-09-01	53.4000
1941-10-01	58.1000
1941-11-01	53.8000
1941-12-01	54.1000
1942-01-01	56.1000
1942-02-01	52.0000
1942-03-01	58.6000
1942-04-01	58.6000
1942-05-01	61.6000
1942-06-01	59.7000
1942-07-01	62.4000
1942-08-01	63.4000
1942-09-01	62.8000
1942-10-01	66.3000
1942-11-01	61.8000
1942-12-01	62.4000
1943-01-01	63.2000
1943-02-01	59.2000
1943-03-01	65.9000
1943-04-01	63.5000
1943-05-01	65.3000
1943-06-01	62.1000
1943-07-01	65.1000
1943-08-01	65.1000
1943-09-01	63.6000
1943-10-01	65.8000
1943-11-01	62.4000
1943-12-01	63.5000