Month	Locomotives
1921-01-01	15156.0
1921-02-01	15046.0
1921-03-01	15001.0
1921-04-01	15122.0
1921-05-01	15134.0
1921-06-01	15204.0
1921-07-01	15194.0
1921-08-01	15148.0
1921-09-01	15143.0
1921-10-01	14963.0
1921-11-01	14997.0
1921-12-01	15111.0
1922-01-01	15179.0
1922-02-01	15112.0
1922-03-01	15112.0
1922-04-01	15073.0
1922-05-01	15040.0
1922-06-01	15032.0
1922-07-01	15168.0
1922-08-01	15023.0
1922-09-01	14901.0
1922-10-01	14682.0
1922-11-01	14702.0
1922-12-01	14809.0
1923-01-01	14806.0
1923-02-01	14806.0
1923-03-01	14698.0
1923-04-01	14580.0
1923-05-01	14516.0
1923-06-01	14602.0
1923-07-01	14605.0
1923-08-01	14549.0
1923-09-01	14454.0
1923-10-01	14301.0
1923-11-01	14239.0
1923-12-01	14503.0
1924-01-01	14547.0
1924-02-01	14563.0
1924-03-01	14521.0
1924-04-01	14557.0
1924-05-01	14507.0
1924-06-01	14534.0
1924-07-01	14583.0
1924-08-01	14591.0
1924-09-01	14552.0
1924-10-01	14454.0
1924-11-01	14486.0
1924-12-01	14625.0
1925-01-01	14513.0
1925-02-01	14481.0
1925-03-01	14480.0
1925-04-01	14413.0
1925-05-01	14395.0
1925-06-01	14429.0
1925-07-01	14442.0
1925-08-01	14386.0
1925-09-01	14232.0
1925-10-01	14132.0
1925-11-01	14121.0
1925-12-01	14150.0
1926-01-01	14128.0
1926-02-01	14061.0
1926-03-01	14034.0
1926-04-01	14041.0
1926-05-01	13922.0
1926-06-01	13881.0
1926-07-01	13918.0
1926-08-01	13880.0
1926-09-01	13793.0
1926-10-01	13643.0
1926-11-01	13608.0
1926-12-01	13715.0
1927-01-01	13695.0
1927-02-01	13690.0
1927-03-01	13692.0
1927-04-01	13646.0
1927-05-01	13610.0
1927-06-01	13548.0
1927-07-01	13567.0
1927-08-01	13523.0
1927-09-01	13369.0
1927-10-01	13226.0
1927-11-01	13223.0
1927-12-01	13341.0
1928-01-01	13387.0
1928-02-01	13360.0
1928-03-01	13215.0
1928-04-01	13161.0
1928-05-01	13066.0
1928-06-01	13070.0
1928-07-01	13034.0
1928-08-01	12999.0
1928-09-01	12803.0
1928-10-01	12668.0
1928-11-01	12614.0
1928-12-01	12678.0
1929-01-01	12647.0
1929-02-01	12524.0
1929-03-01	12467.0
1929-04-01	12400.0
1929-05-01	12363.0
1929-06-01	12330.0
1929-07-01	12312.0
1929-08-01	12250.0
1929-09-01	12154.0
1929-10-01	11966.0
1929-11-01	11982.0
1929-12-01	12127.0
1930-01-01	12149.0
1930-02-01	12174.0
1930-03-01	12063.0
1930-04-01	12034.0
1930-05-01	11958.0
1930-06-01	11986.0
1930-07-01	12001.0
1930-08-01	11982.0
1930-09-01	11892.0
1930-10-01	11828.0
1930-11-01	11798.0
1930-12-01	11812.0
1931-01-01	11753.0
1931-02-01	11691.0
1931-03-01	11639.0
1931-04-01	11605.0
1931-05-01	11546.0
1931-06-01	11513.0
1931-07-01	11468.0
1931-08-01	11440.0
1931-09-01	11425.0
1931-10-01	11352.0
1931-11-01	11342.0
1931-12-01	11376.0
1932-01-01	11293.0
1932-02-01	11104.0
1932-03-01	11025.0
1932-04-01	10916.0
1932-05-01	10912.0
1932-06-01	10897.0
1932-07-01	10782.0
1932-08-01	10717.0
1932-09-01	10626.0
1932-10-01	10573.0
1932-11-01	10592.0
1932-12-01	10672.0
1933-01-01	10540.0
1933-02-01	10489.0
1933-03-01	10456.0
1933-04-01	10438.0
1933-05-01	10271.0
1933-06-01	10254.0
1933-07-01	10160.0
1933-08-01	10113.0
1933-09-01	10043.0
1933-10-01	9986.00
1933-11-01	9873.00
1933-12-01	9929.00
1934-01-01	9833.00
1934-02-01	9769.00
1934-03-01	9650.00
1934-04-01	9623.00
1934-05-01	9570.00
1934-06-01	9545.00
1934-07-01	9515.00
1934-08-01	9424.00
1934-09-01	9286.00
1934-10-01	9266.00
1934-11-01	9209.00
1934-12-01	9214.00
1935-01-01	9168.00
1935-02-01	8967.00
1935-03-01	8928.00
1935-04-01	8918.00
1935-05-01	8894.00
1935-06-01	8871.00
1935-07-01	8818.00
1935-08-01	8775.00
1935-09-01	8746.00
1935-10-01	8706.00
1935-11-01	8662.00
1935-12-01	8652.00
1936-01-01	8604.00
1936-02-01	8522.00
1936-03-01	8482.00
1936-04-01	8442.00
1936-05-01	8422.00
1936-06-01	8426.00
1936-07-01	8392.00
1936-08-01	8351.00
1936-09-01	8314.00
1936-10-01	8263.00
1936-11-01	8212.00
1936-12-01	8212.00
1937-01-01	8226.00
1937-02-01	8196.00
1937-03-01	8160.00
1937-04-01	8116.00
1937-05-01	8098.00
1937-06-01	8083.00
1937-07-01	8088.00
1937-08-01	8106.00
1937-09-01	8100.00
1937-10-01	8088.00
1937-11-01	8084.00
1937-12-01	8146.00