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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        963        9.63        9.63
          2 |      1,314       13.14       22.77
          3 |         84        0.84       23.61
          4 |         31        0.31       23.92
          5 |         11        0.11       24.03
          6 |         27        0.27       24.30
          7 |         53        0.53       24.83
          8 |        404        4.04       28.87
          9 |        402        4.02       32.89
          . |      6,711       67.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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