Frequencies for pveh_sc1 variable in parkwork dataset :

    related |
factors (1) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,078       98.81       98.81
         36 |          2        0.18       98.99
         39 |          1        0.09       99.08
         40 |          1        0.09       99.18
         41 |          3        0.27       99.45
         42 |          6        0.55      100.00
------------+-----------------------------------
      Total |      1,091      100.00

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