Frequencies for emergencyservices variable in hqi_hosp dataset :

  Emergency |
   Services |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |        372        7.78        7.78
        Yes |      4,411       92.22      100.00
------------+-----------------------------------
      Total |      4,783      100.00

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