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

 PPS Waiver |
  Indicator |
     (Y=Not |
      Under |
PPS;N=Under |
       PPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,065       80.65       80.65
          0 |         10        0.10       80.75
          B |          4        0.04       80.79
          M |          4        0.04       80.83
          N |      1,147       11.47       92.30
          V |          2        0.02       92.32
          Y |        768        7.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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