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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        931        9.31        9.31
          2 |          4        0.04        9.35
          3 |          8        0.08        9.43
          4 |          2        0.02        9.45
          5 |         45        0.45        9.90
          6 |          1        0.01        9.91
          7 |         11        0.11       10.02
          8 |      1,197       11.97       21.99
          9 |        168        1.68       23.67
         10 |         51        0.51       24.18
         11 |         16        0.16       24.34
         12 |      5,069       50.69       75.03
         13 |        277        2.77       77.80
         14 |        152        1.52       79.32
         15 |         14        0.14       79.46
         16 |          2        0.02       79.48
         17 |         40        0.40       79.88
         18 |         35        0.35       80.23
         19 |         15        0.15       80.38
         20 |          1        0.01       80.39
         21 |         12        0.12       80.51
         22 |          9        0.09       80.60
         23 |         54        0.54       81.14
         24 |        146        1.46       82.60
         25 |         70        0.70       83.30
         26 |         37        0.37       83.67
         27 |         68        0.68       84.35
         29 |         31        0.31       84.66
         30 |        135        1.35       86.01
         31 |         47        0.47       86.48
         32 |         58        0.58       87.06
         33 |        270        2.70       89.76
         34 |        139        1.39       91.15
         35 |        150        1.50       92.65
         36 |         21        0.21       92.86
         37 |         42        0.42       93.28
         38 |        104        1.04       94.32
         39 |         37        0.37       94.69
         40 |          7        0.07       94.76
         41 |         31        0.31       95.07
         42 |        355        3.55       98.62
         43 |        130        1.30       99.92
         44 |          1        0.01       99.93
         99 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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