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

    hosp_hr |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,273       22.73       22.73
          1 |         39        0.39       23.12
          2 |         26        0.26       23.38
          3 |         26        0.26       23.64
          4 |         20        0.20       23.84
          5 |         12        0.12       23.96
          6 |         22        0.22       24.18
          7 |         25        0.25       24.43
          8 |         34        0.34       24.77
          9 |         29        0.29       25.06
         10 |         31        0.31       25.37
         11 |         34        0.34       25.71
         12 |         36        0.36       26.07
         13 |         47        0.47       26.54
         14 |         44        0.44       26.98
         15 |         60        0.60       27.58
         16 |         57        0.57       28.15
         17 |         55        0.55       28.70
         18 |         60        0.60       29.30
         19 |         52        0.52       29.82
         20 |         60        0.60       30.42
         21 |         51        0.51       30.93
         22 |         50        0.50       31.43
         23 |         42        0.42       31.85
         24 |          2        0.02       31.87
         99 |      6,813       68.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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