Frequencies for hour variable in person dataset :

    Time of |
Accident-Ho |
         ur |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         40        3.03        3.03
          1 |         51        3.86        6.88
          2 |         44        3.33       10.21
          3 |         26        1.97       12.18
          4 |         22        1.66       13.84
          5 |         43        3.25       17.10
          6 |         95        7.19       24.28
          7 |         20        1.51       25.79
          8 |         43        3.25       29.05
          9 |         35        2.65       31.69
         10 |         43        3.25       34.95
         11 |         49        3.71       38.65
         12 |         49        3.71       42.36
         13 |         66        4.99       47.35
         14 |         37        2.80       50.15
         15 |         44        3.33       53.48
         16 |         37        2.80       56.28
         17 |         38        2.87       59.15
         18 |         90        6.81       65.96
         19 |        119        9.00       74.96
         20 |        111        8.40       83.36
         21 |         84        6.35       89.71
         22 |         67        5.07       94.78
         23 |         69        5.22      100.00
------------+-----------------------------------
      Total |      1,322      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016