Month	Number Of Locomotives
1921-01-01	47411.0
1921-02-01	47369.0
1921-03-01	47805.0
1921-04-01	48271.0
1921-05-01	48297.0
1921-06-01	48349.0
1921-07-01	48271.0
1921-08-01	48161.0
1921-09-01	48140.0
1921-10-01	48240.0
1921-11-01	48059.0
1921-12-01	48139.0
1922-01-01	48201.0
1922-02-01	47979.0
1922-03-01	47884.0
1922-04-01	47937.0
1922-05-01	47901.0
1922-06-01	47750.0
1922-07-01	47912.0
1922-08-01	47959.0
1922-09-01	47890.0
1922-10-01	47795.0
1922-11-01	47822.0
1922-12-01	47652.0
1923-01-01	47595.0
1923-02-01	47626.0
1923-03-01	47574.0
1923-04-01	47594.0
1923-05-01	47531.0
1923-06-01	47417.0
1923-07-01	47320.0
1923-08-01	47297.0
1923-09-01	47428.0
1923-10-01	47483.0
1923-11-01	47540.0
1923-12-01	47733.0
1924-01-01	47755.0
1924-02-01	47854.0
1924-03-01	47767.0
1924-04-01	47686.0
1924-05-01	47758.0
1924-06-01	47745.0
1924-07-01	47777.0
1924-08-01	47855.0
1924-09-01	47918.0
1924-10-01	47797.0
1924-11-01	47790.0
1924-12-01	47596.0
1925-01-01	47347.0
1925-02-01	47282.0
1925-03-01	47270.0
1925-04-01	47116.0
1925-05-01	46994.0
1925-06-01	46985.0
1925-07-01	46740.0
1925-08-01	46573.0
1925-09-01	46449.0
1925-10-01	46404.0
1925-11-01	46164.0
1925-12-01	46046.0
1926-01-01	46009.0
1926-02-01	45879.0
1926-03-01	45880.0
1926-04-01	45834.0
1926-05-01	45693.0
1926-06-01	45678.0
1926-07-01	45542.0
1926-08-01	45378.0
1926-09-01	45304.0
1926-10-01	45200.0
1926-11-01	45146.0
1926-12-01	45017.0
1927-01-01	45017.0
1927-02-01	44979.0
1927-03-01	44990.0
1927-04-01	44777.0
1927-05-01	44696.0
1927-06-01	44588.0
1927-07-01	44431.0
1927-08-01	44372.0
1927-09-01	44256.0
1927-10-01	44197.0
1927-11-01	43999.0
1927-12-01	43864.0
1928-01-01	43995.0
1928-02-01	43997.0
1928-03-01	43827.0
1928-04-01	43751.0
1928-05-01	43500.0
1928-06-01	43286.0
1928-07-01	43231.0
1928-08-01	43082.0
1928-09-01	42925.0
1928-10-01	42802.0
1928-11-01	42700.0
1928-12-01	42613.0
1929-01-01	42416.0
1929-02-01	42194.0
1929-03-01	42060.0
1929-04-01	41806.0
1929-05-01	41557.0
1929-06-01	41364.0
1929-07-01	41238.0
1929-08-01	41051.0
1929-09-01	41076.0
1929-10-01	40884.0
1929-11-01	40618.0
1929-12-01	40852.0
1930-01-01	40844.0
1930-02-01	40763.0
1930-03-01	40667.0
1930-04-01	40514.0
1930-05-01	40475.0
1930-06-01	40510.0
1930-07-01	40522.0
1930-08-01	40531.0
1930-09-01	40566.0
1930-10-01	40580.0
1930-11-01	40541.0
1930-12-01	40369.0
1931-01-01	40235.0
1931-02-01	40178.0
1931-03-01	40067.0
1931-04-01	40001.0
1931-05-01	40006.0
1931-06-01	39893.0
1931-07-01	39759.0
1931-08-01	39685.0
1931-09-01	39615.0
1931-10-01	39493.0
1931-11-01	39498.0
1931-12-01	39353.0
1932-01-01	39275.0
1932-02-01	38921.0
1932-03-01	38854.0
1932-04-01	38880.0
1932-05-01	38889.0
1932-06-01	38826.0
1932-07-01	38806.0
1932-08-01	38715.0
1932-09-01	38439.0
1932-10-01	38222.0
1932-11-01	38283.0
1932-12-01	38183.0
1933-01-01	37997.0
1933-02-01	37942.0
1933-03-01	37905.0
1933-04-01	37909.0
1933-05-01	37656.0
1933-06-01	37515.0
1933-07-01	37374.0
1933-08-01	37162.0
1933-09-01	36940.0
1933-10-01	36814.0
1933-11-01	36747.0
1933-12-01	36577.0
1934-01-01	36313.0
1934-02-01	36272.0
1934-03-01	36023.0
1934-04-01	35878.0
1934-05-01	35776.0
1934-06-01	35675.0
1934-07-01	35458.0
1934-08-01	35312.0
1934-09-01	35254.0
1934-10-01	35150.0
1934-11-01	35065.0
1934-12-01	34753.0
1935-01-01	34585.0
1935-02-01	34662.0
1935-03-01	34525.0
1935-04-01	34451.0
1935-05-01	34416.0
1935-06-01	34309.0
1935-07-01	34132.0
1935-08-01	34012.0
1935-09-01	33928.0
1935-10-01	33834.0
1935-11-01	33762.0
1935-12-01	33651.0
1936-01-01	33630.0
1936-02-01	33513.0
1936-03-01	33425.0
1936-04-01	33326.0
1936-05-01	33233.0
1936-06-01	33131.0
1936-07-01	33055.0
1936-08-01	33003.0
1936-09-01	32932.0
1936-10-01	32775.0
1936-11-01	32621.0
1936-12-01	32490.0
1937-01-01	32542.0
1937-02-01	32461.0
1937-03-01	32348.0
1937-04-01	32213.0
1937-05-01	32136.0
1937-06-01	32098.0
1937-07-01	32051.0
1937-08-01	32043.0
1937-09-01	32027.0
1937-10-01	31970.0
1937-11-01	32003.0
1937-12-01	32013.0
1938-01-01	32043.0
1938-02-01	32001.0
1938-03-01	31965.0
1938-04-01	31969.0
1938-05-01	32006.0
1938-06-01	32000.0
1938-07-01	31918.0
1938-08-01	31800.0
1938-09-01	31684.0
1938-10-01	31598.0
1938-11-01	31541.0
1938-12-01	31426.0
1939-01-01	31335.0
1939-02-01	31171.0
1939-03-01	31063.0
1939-04-01	31075.0
1939-05-01	31002.0
1939-06-01	30891.0
1939-07-01	30819.0
1939-08-01	30759.0
1939-09-01	30683.0
1939-10-01	30527.0
1939-11-01	30340.0
1939-12-01	30183.0
1940-01-01	30086.0
1940-02-01	29958.0
1940-03-01	29912.0
1940-04-01	29819.0
1940-05-01	29675.0
1940-06-01	29608.0
1940-07-01	29532.0
1940-08-01	29431.0
1940-09-01	29400.0
1940-10-01	29359.0
1940-11-01	29301.0
1940-12-01	29224.0
1941-01-01	29176.0
1941-02-01	29075.0
1941-03-01	28982.0
1941-04-01	28943.0
1941-05-01	28885.0
1941-06-01	28806.0
1941-07-01	28796.0
1941-08-01	28775.0
1941-09-01	28800.0
1941-10-01	28821.0
1941-11-01	28809.0
1941-12-01	28806.0
1942-01-01	28880.0
1942-02-01	28831.0
1942-03-01	28762.0
1942-04-01	28727.0
1942-05-01	28720.0
1942-06-01	28723.0
1942-07-01	28654.0
1942-08-01	28694.0
1942-09-01	28776.0
1942-10-01	28751.0
1942-11-01	28687.0
1942-12-01	28651.0
1943-01-01	28725.0
1943-02-01	28744.0
1943-03-01	28756.0
1943-04-01	28744.0
1943-05-01	28749.0
1943-06-01	28805.0
1943-07-01	28797.0