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

    hosp_hr |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,393       23.93       23.93
          1 |         50        0.50       24.43
          2 |         46        0.46       24.89
          3 |         33        0.33       25.22
          4 |         30        0.30       25.52
          5 |         17        0.17       25.69
          6 |         28        0.28       25.97
          7 |         36        0.36       26.33
          8 |         47        0.47       26.80
          9 |         25        0.25       27.05
         10 |         48        0.48       27.53
         11 |         54        0.54       28.07
         12 |         57        0.57       28.64
         13 |         58        0.58       29.22
         14 |         72        0.72       29.94
         15 |         80        0.80       30.74
         16 |         87        0.87       31.61
         17 |         71        0.71       32.32
         18 |         82        0.82       33.14
         19 |         81        0.81       33.95
         20 |         75        0.75       34.70
         21 |         67        0.67       35.37
         22 |         60        0.60       35.97
         23 |         56        0.56       36.53
         24 |          1        0.01       36.54
         99 |      6,346       63.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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