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

      Gross |
    vehicle |
     weight |
     rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,201       92.01       92.01
          1 |          3        0.03       92.04
          2 |        160        1.60       93.64
          3 |        592        5.92       99.56
          8 |          3        0.03       99.59
          9 |         41        0.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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