Frequencies for wgtcd_tr variable in vehnit dataset :

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        100        7.86        7.86
          2 |        211       16.59       24.45
          3 |         20        1.57       26.02
          4 |         15        1.18       27.20
          5 |         13        1.02       28.22
          6 |         34        2.67       30.90
          7 |         13        1.02       31.92
          8 |        109        8.57       40.49
          9 |         79        6.21       46.70
          . |        678       53.30      100.00
------------+-----------------------------------
      Total |      1,272      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016