"c VAR 0252 03032 TON AGE 3S 955-964 MD= 1E-37 " "c REF 0252 LOC 2229 WIDTH 9 DK 36 COL 26-34 " "c EXP DEC= 1 " "c " "c INDEX OF TRUCK TONNAGE FOR GENERAL FREIGHT CARRIERS, " "c SEASONALLY ADJUSTED " "c ---------------------------------------------------- " "c " "c NBER SERIES: 03032 " "c AREA COVERED: U.S. " "c UNITS: 1957-1959=100 " "c ANNUAL COVERAGE: NONE " "c QUARTERLY COVERAGE: NONE " "c MONTHLY COVERAGE: 01/1955-03/1964 " "c SEASONAL ADJUSTMENT: SEASONALLY ADJUSTED BY SOURCE " "c SOURCE: U.S. BUREAU OF THE CENSUS; ORIGINALLY FROM THE " "c AMERICAN TRUCKING ASSOCIATION, DEPARTMENT OF RESEARCH AND " "c TRANSPORT ECONOMICS. " "c " "c NOTES: SERIES 03032 IS PRESENTED HERE AS TWO " "c VARIABLES--(1)--SEASONALLY ADJUSTED DATA, QUARTERLY, " "c 1946-1960 (2)--SEASONALLY ADJUSTED DATA, MONTHLY, " "c 1955-1964. " "c " "c CHECKED MANUALLY; NO CORRECTIONS NECESSARY. " "c " "c ............................................................... "