Frequencies for emergencyservices variable in hqi_hosp dataset :

  Emergency |
   Services |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |        373        7.73        7.73
        Yes |      4,451       92.27      100.00
------------+-----------------------------------
      Total |      4,824      100.00

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