Frequencies for first 10,000 rows of hosp_qual variable in psfltc dataset :

   Hospital |
    Quality |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,272       52.72       52.72
          0 |         15        0.15       52.87
          1 |      4,713       47.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 24 Sep 2018