Frequencies for hosp_hr variable in accident dataset :

    hosp_hr |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        462       99.78       99.78
          4 |          1        0.22      100.00
------------+-----------------------------------
      Total |        463      100.00

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