Frequencies for first 10,000 rows of p_sf1 variable in person dataset :

    Related |
factors (1) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,922       99.22       99.22
          5 |          2        0.02       99.24
          8 |          1        0.01       99.25
          9 |          2        0.02       99.27
         13 |          5        0.05       99.32
         18 |          6        0.06       99.38
         37 |         16        0.16       99.54
         42 |          1        0.01       99.55
         56 |         18        0.18       99.73
         62 |          1        0.01       99.74
         66 |          4        0.04       99.78
         68 |          1        0.01       99.79
         82 |          1        0.01       99.80
         88 |          1        0.01       99.81
         91 |          4        0.04       99.85
         99 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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