Frequencies for first 10,000 rows of p_sf3 variable in person dataset :

    related |
factors (3) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,994       99.94       99.94
         99 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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