Frequencies for first 10,000 rows of impact2 variable in vehicle dataset :

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        654        6.54        6.54
          1 |        393        3.93       10.47
          2 |        239        2.39       12.86
          3 |        576        5.76       18.62
          4 |        102        1.02       19.64
          5 |        118        1.18       20.82
          6 |        363        3.63       24.45
          7 |        140        1.40       25.85
          8 |        124        1.24       27.09
          9 |        745        7.45       34.54
         10 |        195        1.95       36.49
         11 |        497        4.97       41.46
         12 |      5,023       50.23       91.69
         13 |        172        1.72       93.41
         14 |        374        3.74       97.15
         99 |        285        2.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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