Frequencies for psi_90_safety_betterstr variable in vwhqi_hosp_ahrq_state dataset :

PSI_90_SAFE |
  TY_BETTER |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         21       37.50       37.50
          1 |         10       17.86       55.36
         11 |          1        1.79       57.14
          2 |          8       14.29       71.43
          3 |          4        7.14       78.57
          5 |          2        3.57       82.14
          6 |          2        3.57       85.71
          7 |          1        1.79       87.50
          8 |          1        1.79       89.29
        N/A |          6       10.71      100.00
------------+-----------------------------------
      Total |         56      100.00

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