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

    persons |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,309       23.09       23.09
          2 |      3,526       35.26       58.35
          3 |      1,812       18.12       76.47
          4 |        993        9.93       86.40
          5 |        564        5.64       92.04
          6 |        338        3.38       95.42
          7 |        189        1.89       97.31
          8 |        121        1.21       98.52
          9 |         55        0.55       99.07
         10 |         23        0.23       99.30
         11 |         22        0.22       99.52
         12 |         15        0.15       99.67
         13 |          9        0.09       99.76
         14 |          4        0.04       99.80
         15 |          2        0.02       99.82
         16 |          3        0.03       99.85
         17 |          2        0.02       99.87
         18 |          2        0.02       99.89
         19 |          1        0.01       99.90
         20 |          2        0.02       99.92
         22 |          4        0.04       99.96
         24 |          2        0.02       99.98
         38 |          1        0.01       99.99
         75 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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