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

  number of |
 persons in |
      motor |
   vehicles |
in-transpor |
          t |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          7        0.07        0.07
          1 |      4,345       43.45       43.52
          2 |      2,632       26.32       69.84
          3 |      1,437       14.37       84.21
          4 |        719        7.19       91.40
          5 |        388        3.88       95.28
          6 |        212        2.12       97.40
          7 |        103        1.03       98.43
          8 |         70        0.70       99.13
          9 |         29        0.29       99.42
         10 |         18        0.18       99.60
         11 |         13        0.13       99.73
         12 |          8        0.08       99.81
         13 |          2        0.02       99.83
         14 |          4        0.04       99.87
         15 |          2        0.02       99.89
         16 |          3        0.03       99.92
         17 |          1        0.01       99.93
         18 |          1        0.01       99.94
         22 |          1        0.01       99.95
         26 |          1        0.01       99.96
         30 |          1        0.01       99.97
         35 |          1        0.01       99.98
         49 |          1        0.01       99.99
         51 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016