Frequencies for p_cf1 variable in person dataset :

    RELATED |
   FACTOR 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,262       98.44       98.44
          1 |          4        0.31       98.75
          2 |          1        0.08       98.83
          3 |          9        0.70       99.53
          4 |          5        0.39       99.92
          5 |          1        0.08      100.00
------------+-----------------------------------
      Total |      1,282      100.00

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