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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,444       14.44       14.44
          2 |        827        8.27       22.71
          3 |         43        0.43       23.14
          4 |         22        0.22       23.36
          5 |          3        0.03       23.39
          6 |         26        0.26       23.65
          7 |         35        0.35       24.00
          8 |        357        3.57       27.57
          9 |        463        4.63       32.20
          . |      6,780       67.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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