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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,160       11.60       11.60
          2 |      1,127       11.27       22.87
          3 |         39        0.39       23.26
          4 |         27        0.27       23.53
          5 |          6        0.06       23.59
          6 |         37        0.37       23.96
          7 |         55        0.55       24.51
          8 |        344        3.44       27.95
          9 |        485        4.85       32.80
          . |      6,720       67.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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