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

    persons |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,390       23.90       23.90
          2 |      3,575       35.75       59.65
          3 |      1,756       17.56       77.21
          4 |        973        9.73       86.94
          5 |        560        5.60       92.54
          6 |        283        2.83       95.37
          7 |        174        1.74       97.11
          8 |        102        1.02       98.13
          9 |         66        0.66       98.79
         10 |         44        0.44       99.23
         11 |         25        0.25       99.48
         12 |         18        0.18       99.66
         13 |         13        0.13       99.79
         14 |          5        0.05       99.84
         15 |          3        0.03       99.87
         16 |          1        0.01       99.88
         17 |          2        0.02       99.90
         20 |          1        0.01       99.91
         22 |          4        0.04       99.95
         28 |          1        0.01       99.96
         29 |          1        0.01       99.97
         45 |          1        0.01       99.98
         48 |          1        0.01       99.99
         51 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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