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 |         21        0.21        0.21
          1 |      4,300       43.00       43.21
          2 |      2,580       25.80       69.01
          3 |      1,373       13.73       82.74
          4 |        751        7.51       90.25
          5 |        412        4.12       94.37
          6 |        252        2.52       96.89
          7 |        130        1.30       98.19
          8 |         78        0.78       98.97
          9 |         43        0.43       99.40
         10 |         21        0.21       99.61
         11 |         13        0.13       99.74
         12 |          8        0.08       99.82
         13 |          4        0.04       99.86
         14 |          2        0.02       99.88
         15 |          3        0.03       99.91
         16 |          1        0.01       99.92
         19 |          4        0.04       99.96
         21 |          1        0.01       99.97
         22 |          1        0.01       99.98
         33 |          1        0.01       99.99
         52 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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