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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,316       13.16       13.16
          2 |      1,031       10.31       23.47
          3 |         46        0.46       23.93
          4 |         16        0.16       24.09
          5 |         11        0.11       24.20
          6 |         39        0.39       24.59
          7 |         62        0.62       25.21
          8 |        381        3.81       29.02
          9 |        484        4.84       33.86
          . |      6,614       66.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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