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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,651       16.51       16.51
          2 |        607        6.07       22.58
          3 |         29        0.29       22.87
          4 |         13        0.13       23.00
          5 |          8        0.08       23.08
          6 |         66        0.66       23.74
          7 |         46        0.46       24.20
          8 |        287        2.87       27.07
          9 |        505        5.05       32.12
          . |      6,788       67.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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