Frequencies for first 10,000 rows of pps_blend variable in psfhos201710 dataset :

Federal PPS |
      Blend |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,513       95.13       95.13
          0 |        429        4.29       99.42
          1 |         54        0.54       99.96
          O |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Feb 2018