Month	Locomotives
1921-01-01	11497.0
1921-02-01	11435.0
1921-03-01	11440.0
1921-04-01	11508.0
1921-05-01	11575.0
1921-06-01	11777.0
1921-07-01	11781.0
1921-08-01	11719.0
1921-09-01	11721.0
1921-10-01	11531.0
1921-11-01	11572.0
1921-12-01	11834.0
1922-01-01	11797.0
1922-02-01	11660.0
1922-03-01	11704.0
1922-04-01	11723.0
1922-05-01	11756.0
1922-06-01	11937.0
1922-07-01	11854.0
1922-08-01	11304.0
1922-09-01	10912.0
1922-10-01	10779.0
1922-11-01	10933.0
1922-12-01	11224.0
1923-01-01	11191.0
1923-02-01	11221.0
1923-03-01	11202.0
1923-04-01	11203.0
1923-05-01	11426.0
1923-06-01	11650.0
1923-07-01	11706.0
1923-08-01	11783.0
1923-09-01	11771.0
1923-10-01	11606.0
1923-11-01	11560.0
1923-12-01	11909.0
1924-01-01	11883.0
1924-02-01	11809.0
1924-03-01	11783.0
1924-04-01	11806.0
1924-05-01	11788.0
1924-06-01	11886.0
1924-07-01	11965.0
1924-08-01	12010.0
1924-09-01	11871.0
1924-10-01	11686.0
1924-11-01	11801.0
1924-12-01	12074.0
1925-01-01	11890.0
1925-02-01	11784.0
1925-03-01	11750.0
1925-04-01	11695.0
1925-05-01	11811.0
1925-06-01	11890.0
1925-07-01	12005.0
1925-08-01	11920.0
1925-09-01	11716.0
1925-10-01	11570.0
1925-11-01	11605.0
1925-12-01	11830.0
1926-01-01	11717.0
1926-02-01	11579.0
1926-03-01	11493.0
1926-04-01	11491.0
1926-05-01	11510.0
1926-06-01	11600.0
1926-07-01	11677.0
1926-08-01	11576.0
1926-09-01	11502.0
1926-10-01	11269.0
1926-11-01	11302.0
1926-12-01	11511.0
1927-01-01	11429.0
1927-02-01	11395.0
1927-03-01	11348.0
1927-04-01	11350.0
1927-05-01	11331.0
1927-06-01	11316.0
1927-07-01	11490.0
1927-08-01	11390.0
1927-09-01	11231.0
1927-10-01	10989.0
1927-11-01	10947.0
1927-12-01	11274.0
1928-01-01	11191.0
1928-02-01	11092.0
1928-03-01	10960.0
1928-04-01	10928.0
1928-05-01	10905.0
1928-06-01	11014.0
1928-07-01	11014.0
1928-08-01	10932.0
1928-09-01	10713.0
1928-10-01	10497.0
1928-11-01	10504.0
1928-12-01	10698.0
1929-01-01	10580.0
1929-02-01	10400.0
1929-03-01	10367.0
1929-04-01	10302.0
1929-05-01	10397.0
1929-06-01	10478.0
1929-07-01	10455.0
1929-08-01	10362.0
1929-09-01	10165.0
1929-10-01	9918.00
1929-11-01	9983.00
1929-12-01	10278.0
1930-01-01	10168.0
1930-02-01	10116.0
1930-03-01	10056.0
1930-04-01	9980.00
1930-05-01	9959.00
1930-06-01	10039.0
1930-07-01	10057.0
1930-08-01	10023.0
1930-09-01	9809.00
1930-10-01	9681.00
1930-11-01	9643.00
1930-12-01	9738.00
1931-01-01	9532.00
1931-02-01	9442.00
1931-03-01	9324.00
1931-04-01	9303.00
1931-05-01	9239.00
1931-06-01	9214.00
1931-07-01	9176.00
1931-08-01	9088.00
1931-09-01	8982.00
1931-10-01	8856.00
1931-11-01	8793.00
1931-12-01	8947.00
1932-01-01	8734.00
1932-02-01	8594.00
1932-03-01	8402.00
1932-04-01	8274.00
1932-05-01	8237.00
1932-06-01	8254.00
1932-07-01	8161.00
1932-08-01	8049.00
1932-09-01	7853.00
1932-10-01	7676.00
1932-11-01	7688.00
1932-12-01	7827.00
1933-01-01	7630.00
1933-02-01	7661.00
1933-03-01	7562.00
1933-04-01	7532.00
1933-05-01	7338.00
1933-06-01	7282.00
1933-07-01	7220.00
1933-08-01	7184.00
1933-09-01	7151.00
1933-10-01	6993.00
1933-11-01	6856.00
1933-12-01	7060.00
1934-01-01	6915.00
1934-02-01	6855.00
1934-03-01	6804.00
1934-04-01	6731.00
1934-05-01	6770.00
1934-06-01	6779.00
1934-07-01	6809.00
1934-08-01	6783.00
1934-09-01	6584.00
1934-10-01	6516.00
1934-11-01	6458.00
1934-12-01	6630.00
1935-01-01	6532.00
1935-02-01	6434.00
1935-03-01	6364.00
1935-04-01	6312.00
1935-05-01	6324.00
1935-06-01	6397.00
1935-07-01	6406.00
1935-08-01	6451.00
1935-09-01	6411.00
1935-10-01	6318.00
1935-11-01	6322.00
1935-12-01	6404.00
1936-01-01	6448.00
1936-02-01	6400.00
1936-03-01	6322.00
1936-04-01	6250.00
1936-05-01	6327.00
1936-06-01	6440.00
1936-07-01	6468.00
1936-08-01	6457.00
1936-09-01	6414.00
1936-10-01	6402.00
1936-11-01	6408.00
1936-12-01	6559.00
1937-01-01	6656.00
1937-02-01	6524.00
1937-03-01	6445.00
1937-04-01	6406.00
1937-05-01	6430.00
1937-06-01	6470.00
1937-07-01	6512.00
1937-08-01	6527.00
1937-09-01	6470.00
1937-10-01	6415.00
1937-11-01	6364.00
1937-12-01	6532.00