Frequencies for psi_90_safety_fstr variable in vwhqi_hosp_ahrq dataset :

PSI_90_SAFE |
       TY_F |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          4        0.09        0.09
          5 |      1,259       27.41       27.49
          . |      3,331       72.51      100.00
------------+-----------------------------------
      Total |      4,594      100.00

by Jean Roth , jroth@nber.org , 16 Nov 2016