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

    persons |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,203       22.03       22.03
          2 |      3,536       35.36       57.39
          3 |      1,843       18.43       75.82
          4 |      1,024       10.24       86.06
          5 |        613        6.13       92.19
          6 |        337        3.37       95.56
          7 |        171        1.71       97.27
          8 |         94        0.94       98.21
          9 |         63        0.63       98.84
         10 |         35        0.35       99.19
         11 |         25        0.25       99.44
         12 |         16        0.16       99.60
         13 |          7        0.07       99.67
         14 |          4        0.04       99.71
         15 |          4        0.04       99.75
         16 |          6        0.06       99.81
         17 |          5        0.05       99.86
         18 |          5        0.05       99.91
         21 |          2        0.02       99.93
         22 |          3        0.03       99.96
         25 |          1        0.01       99.97
         27 |          1        0.01       99.98
         34 |          1        0.01       99.99
         37 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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