Frequencies for psi_90_safety_toofewstr variable in vwhqi_hosp_ahrq_state dataset :

PSI_90_SAFE |
  TY_TOOFEW |      Freq.     Percent        Cum.
------------+-----------------------------------
        N/A |         56      100.00      100.00
------------+-----------------------------------
      Total |         56      100.00

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