Frequencies for first 10,000 rows of pps_blend variable in psfhos201707 dataset :

Federal PPS |
      Blend |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,528       95.28       95.28
          0 |        438        4.38       99.66
          1 |         30        0.30       99.96
          O |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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