NOTE: THIS DATA FILE WILL CHANGE! To improve accessibility of data for all users, we will convert this file from a text format to an html table by the end of June 2024. Title: Serviceable Locomotives Assigned to Freight Service, Class I Railroads for United States Series ID: M01251USM481NNBR Source: National Bureau of Economic Research Release: NBER Macrohistory Database (Not a Press Release) Seasonal Adjustment: Not Seasonally Adjusted Frequency: Monthly Units: Number of Locomotives Date Range: 1920-01-01 to 1943-08-01 Last Updated: 2012-08-16 11:02 AM CDT Notes: Daily Averages Are Used Through January 1935. Thereafter, Midmonth Figures Were Computed Based On End Of Month Data. New York Central Figures Are Not Available, 02-12/1920; Missouri-Pacific Figures Are Not Available, 02-03/1920; Fort Smith And Western Are Not Available, 03/1920. Beginning With 1935, Data Were Computed By NBER By Summing "Number Serviceable (Not Stored)" And "Number Serviceable (Stored)." Switching And Terminal Companies Are Excluded Through December 1936. They Are Included Thereafter Beginning In February 1937. The January 1937 Figure Is The Average Of The 12/1936 And 02/1937 Figures. Source: 1920-1934 Data Are From Interstate Commerce Commission, Freight And Passenger Service Operating Statistics Of Class I Steam Railways In The United States; 1935-1943 Data Are From Icc, Motive Power And Car Equipment Of Class I Steam Railways In The United States. This NBER data series m01251 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html. NBER Indicator: m01251 DATE VALUE 1920-01-01 22458 1920-02-01 21940 1920-03-01 21950 1920-04-01 22073 1920-05-01 22727 1920-06-01 22850 1920-07-01 22759 1920-08-01 23094 1920-09-01 23198 1920-10-01 23478 1920-11-01 23257 1920-12-01 22994 1921-01-01 24141 1921-02-01 24202 1921-03-01 25009 1921-04-01 25183 1921-05-01 25169 1921-06-01 25266 1921-07-01 25144 1921-08-01 25213 1921-09-01 25315 1921-10-01 25564 1921-11-01 25150 1921-12-01 25158 1922-01-01 25109 1922-02-01 24971 1922-03-01 24957 1922-04-01 25039 1922-05-01 25214 1922-06-01 25499 1922-07-01 24473 1922-08-01 23413 1922-09-01 23205 1922-10-01 23860 1922-11-01 24194 1922-12-01 24211 1923-01-01 24228 1923-02-01 24633 1923-03-01 24783 1923-04-01 25133 1923-05-01 25413 1923-06-01 25534 1923-07-01 25667 1923-08-01 26321 1923-09-01 26923 1923-10-01 27256 1923-11-01 27148 1923-12-01 27018 1924-01-01 26896 1924-02-01 26986 1924-03-01 26825 1924-04-01 26751 1924-05-01 26960 1924-06-01 26915 1924-07-01 26945 1924-08-01 27149 1924-09-01 27350 1924-10-01 27319 1924-11-01 27111 1924-12-01 26777 1925-01-01 26578 1925-02-01 26645 1925-03-01 26564 1925-04-01 26645 1925-05-01 26664 1925-06-01 26703 1925-07-01 26654 1925-08-01 26761 1925-09-01 26893 1925-10-01 26867 1925-11-01 26572 1925-12-01 26471 1926-01-01 26406 1926-02-01 26366 1926-03-01 26297 1926-04-01 26273 1926-05-01 26359 1926-06-01 26459 1926-07-01 26534 1926-08-01 26583 1926-09-01 26727 1926-10-01 26792 1926-11-01 26460 1926-12-01 26316 1927-01-01 26172 1927-02-01 26068 1927-03-01 26036 1927-04-01 25848 1927-05-01 25875 1927-06-01 25908 1927-07-01 25917 1927-08-01 25986 1927-09-01 26279 1927-10-01 26334 1927-11-01 25861 1927-12-01 25787 1928-01-01 25829 1928-02-01 25624 1928-03-01 25609 1928-04-01 25504 1928-05-01 25362 1928-06-01 25239 1928-07-01 25263 1928-08-01 25206 1928-09-01 25344 1928-10-01 25355 1928-11-01 25044 1928-12-01 24967 1929-01-01 24776 1929-02-01 24685 1929-03-01 24558 1929-04-01 24438 1929-05-01 24337 1929-06-01 24256 1929-07-01 24240 1929-08-01 24179 1929-09-01 24392 1929-10-01 24435 1929-11-01 24176 1929-12-01 24007 1930-01-01 23868 1930-02-01 23626 1930-03-01 23631 1930-04-01 23569 1930-05-01 23608 1930-06-01 23548 1930-07-01 23586 1930-08-01 23557 1930-09-01 23660 1930-10-01 23660 1930-11-01 23323 1930-12-01 23176 1931-01-01 23025 1931-02-01 22861 1931-03-01 22720 1931-04-01 22697 1931-05-01 22644 1931-06-01 22522 1931-07-01 22515 1931-08-01 22285 1931-09-01 22200 1931-10-01 22172 1931-11-01 21958 1931-12-01 21776 1932-01-01 21510 1932-02-01 21124 1932-03-01 20870 1932-04-01 20816 1932-05-01 20605 1932-06-01 20540 1932-07-01 20444 1932-08-01 20284 1932-09-01 20094 1932-10-01 19858 1932-11-01 19586 1932-12-01 19460 1933-01-01 19219 1933-02-01 19003 1933-03-01 18783 1933-04-01 18663 1933-05-01 18383 1933-06-01 18169 1933-07-01 18036 1933-08-01 17901 1933-09-01 17981 1933-10-01 17940 1933-11-01 17799 1933-12-01 17684 1934-01-01 17564 1934-02-01 17463 1934-03-01 17355 1934-04-01 17200 1934-05-01 17134 1934-06-01 17328 1934-07-01 17292 1934-08-01 17257 1934-09-01 17348 1934-10-01 17256 1934-11-01 16982 1934-12-01 16882 1935-01-01 16773 1935-02-01 17106 1935-03-01 16922 1935-04-01 16827 1935-05-01 16860 1935-06-01 16809 1935-07-01 16670 1935-08-01 16670 1935-09-01 16700 1935-10-01 16706 1935-11-01 16684 1935-12-01 16589 1936-01-01 16732 1936-02-01 16988 1936-03-01 16930 1936-04-01 16843 1936-05-01 16869 1936-06-01 16922 1936-07-01 17070 1936-08-01 17152 1936-09-01 17242 1936-10-01 17484 1936-11-01 17541 1936-12-01 17522 1937-01-01 17668 1937-02-01 17754 1937-03-01 17768 1937-04-01 17784 1937-05-01 17848 1937-06-01 17886 1937-07-01 17968 1937-08-01 18034 1937-09-01 18081 1937-10-01 18065 1937-11-01 17944 1937-12-01 17861 1938-01-01 17628 1938-02-01 17381 1938-03-01 17250 1938-04-01 17184 1938-05-01 16994 1938-06-01 16782 1938-07-01 16700 1938-08-01 16630 1938-09-01 16641 1938-10-01 16547 1938-11-01 16424 1938-12-01 16426 1939-01-01 16338 1939-02-01 16143 1939-03-01 16128 1939-04-01 16190 1939-05-01 16050 1939-06-01 16010 1939-07-01 15986 1939-08-01 15948 1939-09-01 16100 1939-10-01 16338 1939-11-01 16560 1939-12-01 16800 1940-01-01 16944 1940-02-01 16820 1940-03-01 16668 1940-04-01 16640 1940-05-01 16596 1940-06-01 16506 1940-07-01 16564 1940-08-01 16755 1940-09-01 16752 1940-10-01 16786 1940-11-01 16900 1940-12-01 16778 1941-01-01 16740 1941-02-01 16762 1941-03-01 16734 1941-04-01 16828 1941-05-01 17060 1941-06-01 17246 1941-07-01 17501 1941-08-01 17748 1941-09-01 17901 1941-10-01 18160 1941-11-01 18246 1941-12-01 18280 1942-01-01 18502 1942-02-01 18619 1942-03-01 18691 1942-04-01 18788 1942-05-01 18882 1942-06-01 19004 1942-07-01 19109 1942-08-01 19182 1942-09-01 19277 1942-10-01 19526 1942-11-01 19507 1942-12-01 19379 1943-01-01 19446 1943-02-01 19446 1943-03-01 19413 1943-04-01 19422 1943-05-01 19460 1943-06-01 19488 1943-07-01 19556 1943-08-01 19483