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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        945        9.45        9.45
          2 |      1,325       13.25       22.70
          3 |         52        0.52       23.22
          4 |         57        0.57       23.79
          5 |         15        0.15       23.94
          6 |         54        0.54       24.48
          7 |         58        0.58       25.06
          8 |        384        3.84       28.90
          9 |        400        4.00       32.90
          . |      6,710       67.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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