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

    persons |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,013       20.13       20.13
          2 |      3,535       35.35       55.48
          3 |      1,939       19.39       74.87
          4 |      1,079       10.79       85.66
          5 |        625        6.25       91.91
          6 |        315        3.15       95.06
          7 |        190        1.90       96.96
          8 |        116        1.16       98.12
          9 |         60        0.60       98.72
         10 |         40        0.40       99.12
         11 |         21        0.21       99.33
         12 |         18        0.18       99.51
         13 |         11        0.11       99.62
         14 |         12        0.12       99.74
         15 |          8        0.08       99.82
         16 |          4        0.04       99.86
         17 |          3        0.03       99.89
         18 |          4        0.04       99.93
         19 |          2        0.02       99.95
         22 |          2        0.02       99.97
         24 |          1        0.01       99.98
         33 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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