Frequencies for pgvwr variable in parkwork dataset :

      gross |
    vehicle |
     weight |
     rating |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        970       84.64       84.64
          2 |         50        4.36       89.01
          3 |        121       10.56       99.56
          8 |          2        0.17       99.74
          9 |          3        0.26      100.00
------------+-----------------------------------
      Total |      1,146      100.00

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