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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,536       15.36       15.36
          2 |        812        8.12       23.48
          3 |         69        0.69       24.17
          4 |         12        0.12       24.29
          5 |          5        0.05       24.34
          6 |         30        0.30       24.64
          7 |         47        0.47       25.11
          8 |        388        3.88       28.99
          9 |        501        5.01       34.00
          . |      6,600       66.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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