Frequencies for powner variable in parkwork dataset :

 registered |
    vehicle |
      owner |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.09        0.09
          3 |         25        2.21        2.29
          4 |          1        0.09        2.38
          6 |      1,106       97.62      100.00
------------+-----------------------------------
      Total |      1,133      100.00

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