Frequencies for first 10,000 rows of wgtcd_tr variable in vehicle dataset :

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,658       16.58       16.58
          2 |        617        6.17       22.75
          3 |         35        0.35       23.10
          4 |         14        0.14       23.24
          5 |         11        0.11       23.35
          6 |         55        0.55       23.90
          7 |         89        0.89       24.79
          8 |        377        3.77       28.56
          9 |        789        7.89       36.45
          . |      6,355       63.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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