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

    persons |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,200       22.00       22.00
          2 |      3,477       34.77       56.77
          3 |      1,844       18.44       75.21
          4 |      1,062       10.62       85.83
          5 |        617        6.17       92.00
          6 |        344        3.44       95.44
          7 |        176        1.76       97.20
          8 |        102        1.02       98.22
          9 |         57        0.57       98.79
         10 |         47        0.47       99.26
         11 |         20        0.20       99.46
         12 |         13        0.13       99.59
         13 |          8        0.08       99.67
         14 |          7        0.07       99.74
         15 |          5        0.05       99.79
         16 |          2        0.02       99.81
         17 |          4        0.04       99.85
         18 |          1        0.01       99.86
         19 |          2        0.02       99.88
         20 |          3        0.03       99.91
         21 |          3        0.03       99.94
         22 |          3        0.03       99.97
         24 |          1        0.01       99.98
         31 |          1        0.01       99.99
         34 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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