Month	Number Of Locomotive
1920-02-01	29670.0
1920-03-01	29559.0
1920-04-01	30030.0
1920-05-01	29985.0
1920-06-01	29882.0
1920-07-01	29912.0
1920-08-01	30025.0
1920-09-01	30134.0
1920-10-01	30372.0
1920-11-01	30524.0
1920-12-01	30419.0
1921-01-01	32268.0
1921-02-01	32351.0
1921-03-01	32801.0
1921-04-01	33098.0
1921-05-01	33100.0
1921-06-01	33075.0
1921-07-01	33072.0
1921-08-01	33106.0
1921-09-01	33099.0
1921-10-01	33292.0
1921-11-01	33025.0
1921-12-01	33058.0
1922-01-01	33034.0
1922-02-01	32894.0
1922-03-01	32769.0
1922-04-01	32813.0
1922-05-01	32798.0
1922-06-01	32650.0
1922-07-01	32738.0
1922-08-01	33029.0
1922-09-01	33091.0
1922-10-01	33130.0
1922-11-01	33085.0
1922-12-01	32873.0
1923-01-01	32800.0
1923-02-01	32846.0
1923-03-01	32872.0
1923-04-01	32963.0
1923-05-01	32953.0
1923-06-01	32745.0
1923-07-01	32707.0
1923-08-01	32839.0
1923-09-01	33077.0
1923-10-01	33203.0
1923-11-01	33272.0
1923-12-01	33259.0
1924-01-01	33219.0
1924-02-01	33316.0
1924-03-01	33242.0
1924-04-01	33078.0
1924-05-01	33189.0
1924-06-01	33140.0
1924-07-01	33185.0
1924-08-01	33355.0
1924-09-01	33470.0
1924-10-01	33363.0
1924-11-01	33272.0
1924-12-01	33000.0
1925-01-01	32844.0
1925-02-01	32826.0
1925-03-01	32786.0
1925-04-01	32652.0
1925-05-01	32537.0
1925-06-01	32487.0
1925-07-01	32291.0
1925-08-01	32276.0
1925-09-01	32317.0
1925-10-01	32290.0
1925-11-01	32011.0
1925-12-01	31924.0
1926-01-01	31891.0
1926-02-01	31842.0
1926-03-01	31842.0
1926-04-01	31743.0
1926-05-01	31711.0
1926-06-01	31730.0
1926-07-01	31616.0
1926-08-01	31585.0
1926-09-01	31609.0
1926-10-01	31576.0
1926-11-01	31508.0
1926-12-01	31329.0
1927-01-01	31394.0
1927-02-01	31344.0
1927-03-01	31325.0
1927-04-01	31114.0
1927-05-01	30997.0
1927-06-01	30974.0
1927-07-01	30856.0
1927-08-01	30841.0
1927-09-01	30891.0
1927-10-01	30960.0
1927-11-01	30717.0
1927-12-01	30581.0
1928-01-01	30679.0
1928-02-01	30690.0
1928-03-01	30638.0
1928-04-01	30572.0
1928-05-01	30347.0
1928-06-01	30151.0
1928-07-01	30189.0
1928-08-01	30075.0
1928-09-01	30126.0
1928-10-01	30126.0
1928-11-01	30031.0
1928-12-01	29990.0
1929-01-01	29837.0
1929-02-01	29720.0
1929-03-01	29618.0
1929-04-01	29389.0
1929-05-01	29111.0
1929-06-01	28972.0
1929-07-01	28917.0
1929-08-01	28792.0
1929-09-01	28927.0
1929-10-01	28912.0
1929-11-01	28584.0
1929-12-01	28778.0
1930-01-01	28760.0
1930-02-01	28638.0
1930-03-01	28628.0
1930-04-01	28464.0
1930-05-01	28436.0
1930-06-01	28462.0
1930-07-01	28512.0
1930-08-01	28540.0
1930-09-01	28679.0
1930-10-01	28748.0
1930-11-01	28693.0
1930-12-01	28610.0
1931-01-01	28569.0
1931-02-01	28475.0
1931-03-01	28405.0
1931-04-01	28356.0
1931-05-01	28380.0
1931-06-01	28307.0
1931-07-01	28234.0
1931-08-01	28178.0
1931-09-01	28207.0
1931-10-01	28243.0
1931-11-01	28201.0
1931-12-01	28073.0
1932-01-01	28066.0
1932-02-01	27806.0
1932-03-01	27807.0
1932-04-01	27925.0
1932-05-01	27899.0
1932-06-01	27856.0
1932-07-01	27968.0
1932-08-01	27931.0
1932-09-01	27830.0
1932-10-01	27749.0
1932-11-01	27735.0
1932-12-01	27603.0
1933-01-01	27537.0
1933-02-01	27443.0
1933-03-01	27428.0
1933-04-01	27434.0
1933-05-01	27309.0
1933-06-01	27189.0
1933-07-01	27160.0
1933-08-01	26985.0
1933-09-01	26914.0
1933-10-01	26925.0
1933-11-01	26918.0
1933-12-01	26734.0
1934-01-01	26556.0
1934-02-01	26493.0
1934-03-01	26354.0
1934-04-01	26219.0
1934-05-01	26135.0
1934-06-01	26062.0
1934-07-01	25891.0
1934-08-01	25827.0
1934-09-01	25985.0
1934-10-01	25978.0
1934-11-01	25899.0
1934-12-01	25620.0
1935-01-01	25387.0
1935-02-01	25660.0
1935-03-01	25579.0
1935-04-01	25550.0
1935-05-01	25530.0
1935-06-01	25422.0
1935-07-01	25289.0
1935-08-01	25228.0
1935-09-01	25173.0
1935-10-01	25144.0
1935-11-01	25141.0
1935-12-01	25076.0
1936-01-01	24994.0
1936-02-01	24957.0
1936-03-01	24926.0
1936-04-01	24901.0
1936-05-01	24819.0
1936-06-01	24688.0
1936-07-01	24638.0
1936-08-01	24644.0
1936-09-01	24610.0
1936-10-01	24529.0
1936-11-01	24450.0
1936-12-01	24351.0
1937-01-01	24282.0
1937-02-01	24234.0
1937-03-01	24176.0
1937-04-01	24113.0
1937-05-01	24046.0
1937-06-01	23998.0
1937-07-01	23938.0
1937-08-01	23926.0
1937-09-01	23915.0
1937-10-01	23892.0
1937-11-01	23957.0
1937-12-01	23948.0
1938-01-01	23852.0
1938-02-01	23874.0
1938-03-01	23924.0
1938-04-01	23954.0
1938-05-01	23976.0
1938-06-01	23934.0
1938-07-01	23886.0
1938-08-01	23854.0
1938-09-01	23780.0
1938-10-01	23732.0
1938-11-01	23724.0
1938-12-01	23622.0
1939-01-01	23504.0
1939-02-01	23411.0
1939-03-01	23334.0
1939-04-01	23360.0
1939-05-01	23300.0
1939-06-01	23154.0
1939-07-01	23084.0
1939-08-01	23057.0
1939-09-01	22994.0
1939-10-01	22925.0
1939-11-01	22851.0
1939-12-01	22724.0
1940-01-01	22585.0
1940-02-01	22497.0
1940-03-01	22461.0
1940-04-01	22430.0
1940-05-01	22340.0
1940-06-01	22246.0
1940-07-01	22207.0
1940-08-01	22162.0
1940-09-01	22111.0
1940-10-01	22136.0
1940-11-01	22137.0
1940-12-01	22002.0
1941-01-01	21906.0
1941-02-01	21858.0
1941-03-01	21800.0
1941-04-01	21796.0
1941-05-01	21760.0
1941-06-01	21656.0
1941-07-01	21668.0
1941-08-01	21688.0
1941-09-01	21729.0
1941-10-01	21822.0
1941-11-01	21829.0
1941-12-01	21802.0
1942-01-01	21832.0
1942-02-01	21864.0
1942-03-01	21880.0
1942-04-01	21918.0
1942-05-01	21939.0
1942-06-01	21945.0
1942-07-01	21925.0
1942-08-01	21976.0
1942-09-01	22052.0
1942-10-01	22051.0
1942-11-01	22004.0
1942-12-01	21958.0
1943-01-01	21954.0
1943-02-01	22011.0
1943-03-01	22062.0
1943-04-01	22052.0
1943-05-01	22048.0
1943-06-01	22082.0
1943-07-01	22090.0
1943-08-01	22057.0