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

      gross |
    vehicle |
     weight |
     rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,196       91.96       91.96
          1 |          2        0.02       91.98
          2 |        156        1.56       93.54
          3 |        630        6.30       99.84
          8 |          3        0.03       99.87
          9 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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