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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,381       23.81       23.81
          2 |      1,125       11.25       35.06
          3 |         37        0.37       35.43
          4 |         21        0.21       35.64
          5 |          3        0.03       35.67
          6 |         88        0.88       36.55
          7 |         88        0.88       37.43
          8 |        391        3.91       41.34
          9 |        642        6.42       47.76
          . |      5,224       52.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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