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

    persons |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,100       21.00       21.00
          2 |      3,516       35.16       56.16
          3 |      1,962       19.62       75.78
          4 |      1,051       10.51       86.29
          5 |        594        5.94       92.23
          6 |        328        3.28       95.51
          7 |        168        1.68       97.19
          8 |        112        1.12       98.31
          9 |         64        0.64       98.95
         10 |         37        0.37       99.32
         11 |         26        0.26       99.58
         12 |          9        0.09       99.67
         13 |          7        0.07       99.74
         14 |          3        0.03       99.77
         15 |          4        0.04       99.81
         16 |          4        0.04       99.85
         17 |          3        0.03       99.88
         19 |          2        0.02       99.90
         21 |          1        0.01       99.91
         22 |          1        0.01       99.92
         23 |          1        0.01       99.93
         27 |          2        0.02       99.95
         33 |          2        0.02       99.97
         34 |          1        0.01       99.98
         54 |          1        0.01       99.99
         59 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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