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

      gross |
    vehicle |
     weight |
     rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,195       91.95       91.95
          1 |          5        0.05       92.00
          2 |        163        1.63       93.63
          3 |        615        6.15       99.78
          8 |          5        0.05       99.83
          9 |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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