Frequencies for wgtcd_tr variable in vehnit dataset :

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        134       10.09       10.09
          2 |        180       13.55       23.64
          3 |         22        1.66       25.30
          4 |         12        0.90       26.20
          5 |         10        0.75       26.96
          6 |         31        2.33       29.29
          7 |         24        1.81       31.10
          8 |        120        9.04       40.14
          9 |         86        6.48       46.61
          . |        709       53.39      100.00
------------+-----------------------------------
      Total |      1,328      100.00

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