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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,421       14.21       14.21
          2 |        688        6.88       21.09
          3 |         36        0.36       21.45
          4 |         16        0.16       21.61
          5 |          6        0.06       21.67
          6 |         42        0.42       22.09
          7 |         60        0.60       22.69
          8 |        349        3.49       26.18
          9 |        766        7.66       33.84
          . |      6,616       66.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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