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

    Related |
factors (3) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,985       99.85       99.85
         99 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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