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

      Truck |
     Weight |
     Rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        933        9.33        9.33
          2 |      1,217       12.17       21.50
          3 |         87        0.87       22.37
          4 |         25        0.25       22.62
          5 |         11        0.11       22.73
          6 |         54        0.54       23.27
          7 |         60        0.60       23.87
          8 |        482        4.82       28.69
          . |      7,131       71.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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