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

      Truck |
     Weight |
     Rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        909        9.09        9.09
          2 |      1,263       12.63       21.72
          3 |         75        0.75       22.47
          4 |         44        0.44       22.91
          5 |         11        0.11       23.02
          6 |         36        0.36       23.38
          7 |         73        0.73       24.11
          8 |        382        3.82       27.93
          . |      7,207       72.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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