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

    persons |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,498       24.98       24.98
          2 |      3,622       36.22       61.20
          3 |      1,750       17.50       78.70
          4 |        922        9.22       87.92
          5 |        535        5.35       93.27
          6 |        286        2.86       96.13
          7 |        146        1.46       97.59
          8 |         94        0.94       98.53
          9 |         55        0.55       99.08
         10 |         28        0.28       99.36
         11 |         21        0.21       99.57
         12 |          7        0.07       99.64
         13 |         11        0.11       99.75
         14 |          2        0.02       99.77
         15 |          4        0.04       99.81
         16 |          2        0.02       99.83
         17 |          3        0.03       99.86
         18 |          1        0.01       99.87
         19 |          1        0.01       99.88
         20 |          2        0.02       99.90
         21 |          2        0.02       99.92
         22 |          2        0.02       99.94
         25 |          2        0.02       99.96
         41 |          1        0.01       99.97
         46 |          1        0.01       99.98
         49 |          1        0.01       99.99
        145 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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