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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,506       15.06       15.06
          2 |        896        8.96       24.02
          3 |         28        0.28       24.30
          4 |         19        0.19       24.49
          5 |          5        0.05       24.54
          6 |         82        0.82       25.36
          7 |         55        0.55       25.91
          8 |        327        3.27       29.18
          9 |        368        3.68       32.86
          . |      6,714       67.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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