Frequencies for wgtcd_tr variable in vehnit dataset :

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        135        9.12        9.12
          2 |        205       13.84       22.96
          3 |         30        2.03       24.98
          4 |         14        0.95       25.93
          5 |         13        0.88       26.81
          6 |         26        1.76       28.56
          7 |         33        2.23       30.79
          8 |        136        9.18       39.97
          9 |        109        7.36       47.33
          . |        780       52.67      100.00
------------+-----------------------------------
      Total |      1,481      100.00

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