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

    persons |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,700       27.00       27.00
          2 |      3,669       36.69       63.69
          3 |      1,691       16.91       80.60
          4 |        872        8.72       89.32
          5 |        447        4.47       93.79
          6 |        267        2.67       96.46
          7 |        122        1.22       97.68
          8 |         85        0.85       98.53
          9 |         47        0.47       99.00
         10 |         32        0.32       99.32
         11 |         22        0.22       99.54
         12 |         21        0.21       99.75
         13 |          3        0.03       99.78
         14 |          6        0.06       99.84
         15 |          2        0.02       99.86
         16 |          2        0.02       99.88
         17 |          2        0.02       99.90
         18 |          2        0.02       99.92
         20 |          1        0.01       99.93
         21 |          1        0.01       99.94
         23 |          1        0.01       99.95
         25 |          1        0.01       99.96
         27 |          1        0.01       99.97
         28 |          1        0.01       99.98
         36 |          1        0.01       99.99
         38 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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