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

    hosp_hr |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,596       25.96       25.96
          1 |         50        0.50       26.46
          2 |         54        0.54       27.00
          3 |         34        0.34       27.34
          4 |         24        0.24       27.58
          5 |         19        0.19       27.77
          6 |         29        0.29       28.06
          7 |         35        0.35       28.41
          8 |         62        0.62       29.03
          9 |         52        0.52       29.55
         10 |         35        0.35       29.90
         11 |         37        0.37       30.27
         12 |         48        0.48       30.75
         13 |         49        0.49       31.24
         14 |         68        0.68       31.92
         15 |         72        0.72       32.64
         16 |         85        0.85       33.49
         17 |         83        0.83       34.32
         18 |         87        0.87       35.19
         19 |         81        0.81       36.00
         20 |         49        0.49       36.49
         21 |         50        0.50       36.99
         22 |         48        0.48       37.47
         23 |         57        0.57       38.04
         24 |          1        0.01       38.05
         99 |      6,195       61.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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