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 |         10        0.10        0.10
          1 |      4,201       42.01       42.11
          2 |      2,671       26.71       68.82
          3 |      1,460       14.60       83.42
          4 |        717        7.17       90.59
          5 |        383        3.83       94.42
          6 |        254        2.54       96.96
          7 |        127        1.27       98.23
          8 |         74        0.74       98.97
          9 |         26        0.26       99.23
         10 |         27        0.27       99.50
         11 |         15        0.15       99.65
         12 |         13        0.13       99.78
         13 |          8        0.08       99.86
         14 |          4        0.04       99.90
         15 |          3        0.03       99.93
         16 |          1        0.01       99.94
         18 |          3        0.03       99.97
         27 |          1        0.01       99.98
         37 |          1        0.01       99.99
         48 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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