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

      Gross |
    vehicle |
     weight |
     rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,166       91.66       91.66
          1 |          6        0.06       91.72
          2 |        188        1.88       93.60
          3 |        606        6.06       99.66
          9 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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