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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,317       13.17       13.17
          2 |      1,026       10.26       23.43
          3 |         58        0.58       24.01
          4 |         35        0.35       24.36
          5 |         18        0.18       24.54
          6 |         37        0.37       24.91
          7 |         55        0.55       25.46
          8 |        392        3.92       29.38
          9 |        498        4.98       34.36
          . |      6,564       65.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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