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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        986        9.86        9.86
          2 |      1,263       12.63       22.49
          3 |         87        0.87       23.36
          4 |         13        0.13       23.49
          5 |         15        0.15       23.64
          6 |         53        0.53       24.17
          7 |         38        0.38       24.55
          8 |        398        3.98       28.53
          9 |        498        4.98       33.51
          . |      6,649       66.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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