Frequencies for hosp_hr variable in accident dataset :

EMS Time at |
Hospital-Ho |
         ur |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        569       99.65       99.65
         99 |          2        0.35      100.00
------------+-----------------------------------
      Total |        571      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016