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 |         13        0.13        0.13
          1 |      4,319       43.19       43.32
          2 |      2,686       26.86       70.18
          3 |      1,318       13.18       83.36
          4 |        727        7.27       90.63
          5 |        418        4.18       94.81
          6 |        206        2.06       96.87
          7 |        113        1.13       98.00
          8 |         73        0.73       98.73
          9 |         51        0.51       99.24
         10 |         22        0.22       99.46
         11 |         14        0.14       99.60
         12 |          9        0.09       99.69
         13 |          7        0.07       99.76
         14 |          3        0.03       99.79
         15 |          4        0.04       99.83
         16 |          4        0.04       99.87
         17 |          3        0.03       99.90
         18 |          2        0.02       99.92
         19 |          1        0.01       99.93
         20 |          2        0.02       99.95
         21 |          1        0.01       99.96
         22 |          3        0.03       99.99
         42 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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