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

      Truck |
     Weight |
     Rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        895        8.95        8.95
          2 |      1,207       12.07       21.02
          3 |         96        0.96       21.98
          4 |         25        0.25       22.23
          5 |         10        0.10       22.33
          6 |         55        0.55       22.88
          7 |         40        0.40       23.28
          8 |        368        3.68       26.96
          . |      7,304       73.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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