Frequencies for wgtcd_tr variable in vehicle dataset :

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        130       18.16       18.16
          2 |         26        3.63       21.79
          3 |          2        0.28       22.07
          4 |          2        0.28       22.35
          6 |          4        0.56       22.91
          7 |          5        0.70       23.60
          8 |         10        1.40       25.00
          9 |        103       14.39       39.39
          . |        434       60.61      100.00
------------+-----------------------------------
      Total |        716      100.00

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