Frequencies for pv_config variable in parkwork dataset :

    Vehicle |
Configurati |
         on |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        900       84.59       84.59
          1 |         50        4.70       89.29
          2 |         15        1.41       90.70
          4 |          4        0.38       91.07
          5 |          6        0.56       91.64
          6 |         75        7.05       98.68
          7 |          3        0.28       98.97
         19 |          3        0.28       99.25
         21 |          2        0.19       99.44
         98 |          3        0.28       99.72
         99 |          3        0.28      100.00
------------+-----------------------------------
      Total |      1,064      100.00

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