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

      TRUCK |
WEIGHT CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,638       16.38       16.38
          2 |        665        6.65       23.03
          3 |         54        0.54       23.57
          4 |         10        0.10       23.67
          5 |          7        0.07       23.74
          6 |         58        0.58       24.32
          7 |         36        0.36       24.68
          8 |        301        3.01       27.69
          9 |        566        5.66       33.35
          . |      6,665       66.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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