"c           VAR 0627      02083 RR MLG     877-963               MD= 1E-37   "
"c           REF 0627         LOC  565 WIDTH  9             DK   9 COL 71-79  "
"c                                                 EXP DEC=  1                "
"c                                                                            "
"c              INCREASES IN RAILROAD TRACK MILEAGE OPERATED, INTERSTATE      "
"c              COMMERCE COMMISSION.                                          "
"c              --------------------------------------------------------      "
"c                                                                            "
"c              NBER SERIES: 02083                                            "
"c              AREA COVERED: U.S.                                            "
"c              UNITS: THOUSAND MILES                                         "
"c              ANNUAL COVERAGE: 1877-1963                                    "
"c              QUARTERLY COVERAGE: NONE                                      "
"c              MONTHLY COVERAGE: NONE                                        "
"c              SEASONAL ADJUSTMENT: NONE                                     "
"c              SOURCE: 1877-1890:"HISTORICAL STATISTICS OF THE UNITED        "
"c              STATES, COLONIAL TIMES TO 1957," BUREAU OF THE CENSUS,        "
"c              SERIES Q17. 1891-1956: IBID., SERIES Q48. 1957-1962: IBID.,   "
"c             "CONTINUATION TO 1962 AND REVISIONS," BUREAU OF THE CENSUS,    "
"c              FEBRUARY 1965, SERIES Q48. 1963:"TRANSPORT STATISTICS IN      "
"c              THE UNITED STATES, PART 1", INTERSTATE COMMERCE COMMISSION,   "
"c              BUREAU OF TRANSPORT ECONOMICS AND STATISTICS.                 "
"c                                                                            "
"c              NOTES: THESE DATA ARE YEAR-TO-YEAR CHANGES IN TOTAL OPERATED  "
"c              TRACK MILEAGE AS PUBLISHED IN THE ABOVE SOURCES. DATA ON      "
"c              INCREASES FOR THE YEARS 1877-90 AND 1917-63, ARE FOR          "
"c              CALENDAR YEARS; THOSE FOR 1891-1916 ARE FOR YEARS ENDING      "
"c              JUNE 30. DATA ON OPERATED TRACK MILEAGE ARE COMPILED BY THE   "
"c              INTERSTATE COMMERCE COMMISSION. DATA FOR 1876-90 ARE FROM     "
"c             "RAILWAY STATISTICS BEFORE 1890," ICC STATEMENT NO. 32151      "
"c              (MIMEOGRAPHED), 1932. FOR THESE HISTORICAL DATA THE ICC USED  "
"c              THE ANNUAL"POOR'S MANUAL OF RAILROADS." DATA FOR 1891-1954    "
"c              ARE FROM ICC,"STATISTICS OF RAILWAYS IN THE UNITED STATES."   "
"c              LATER DATA ARE FROM"TRANSPORT STATISTICS IN THE UNITED        "
"c              STATES, PART 1."                                              "
"c                  OPERATED TRACK INCLUDES MAIN TRACKS, YARD TRACKS, AND     "
"c              SIDINGS. THE DATA COVER CLASS I, II, AND III RAILROADS.       "
"c              PRIOR TO 1908 THEY ALSO INCLUDED SWITCHING AND TERMINAL       "
"c              COMPANIES."CIRCULAR" AND UNOFFICIAL ROADS ARE EXCLUDED.       "
"c              ALASKA AND HAWAII ARE INCLUDED BEGINNING WITH DATA FOR 1960.  "
"c              EACH COMPANY REPORTED ITS TOTAL OPERATED TRACK MILEAGE;       "
"c              SINCE TWO COMPANIES MIGHT OPERATE THE SAME TRACK, THERE IS    "
"c              SOME DUPLICATION. DATA FOR DIFFERENT YEARS ARE OFTEN NOT      "
"c              ENTIRELY COMPARABLE BECAUSE OF CHANGES IN ACCOUNTING AND      "
"c              REPORTING METHODS.                                            "
"c                                                                            "
"c              ORIGINALS MISSING; NOT PROOFREAD.                             "
"c           ...............................................................  "