Frequencies for first 10,000 rows of hosp_hr variable in accident dataset :

    hosp_hr |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,309       23.09       23.09
          1 |         79        0.79       23.88
          2 |         88        0.88       24.76
          3 |         49        0.49       25.25
          4 |         40        0.40       25.65
          5 |         42        0.42       26.07
          6 |         42        0.42       26.49
          7 |         74        0.74       27.23
          8 |         58        0.58       27.81
          9 |         52        0.52       28.33
         10 |         60        0.60       28.93
         11 |         62        0.62       29.55
         12 |         86        0.86       30.41
         13 |         86        0.86       31.27
         14 |        104        1.04       32.31
         15 |        116        1.16       33.47
         16 |        115        1.15       34.62
         17 |        129        1.29       35.91
         18 |        148        1.48       37.39
         19 |        130        1.30       38.69
         20 |        104        1.04       39.73
         21 |        118        1.18       40.91
         22 |         96        0.96       41.87
         23 |         91        0.91       42.78
         24 |          1        0.01       42.79
         99 |      5,721       57.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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