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

      truck |
     weight |
     rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        940        9.40        9.40
          2 |      1,187       11.87       21.27
          3 |         68        0.68       21.95
          4 |         37        0.37       22.32
          5 |         20        0.20       22.52
          6 |         47        0.47       22.99
          7 |         52        0.52       23.51
          8 |        357        3.57       27.08
          . |      7,292       72.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016