Frequencies for pvintype variable in parkwork dataset :

vin vehicle |
       type |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         37        3.39        3.39
          M |          6        0.55        3.94
          P |        575       52.70       56.65
          T |        459       42.07       98.72
          U |         14        1.28      100.00
------------+-----------------------------------
      Total |      1,091      100.00

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