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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,099       10.99       10.99
          2 |          3        0.03       11.02
          3 |         58        0.58       11.60
          4 |          1        0.01       11.61
          5 |        103        1.03       12.64
          7 |         20        0.20       12.84
          8 |      1,869       18.69       31.53
          9 |        249        2.49       34.02
         10 |        176        1.76       35.78
         11 |         21        0.21       35.99
         12 |      3,544       35.44       71.43
         13 |         53        0.53       71.96
         14 |        167        1.67       73.63
         16 |         25        0.25       73.88
         17 |        175        1.75       75.63
         18 |         33        0.33       75.96
         19 |        247        2.47       78.43
         20 |        295        2.95       81.38
         21 |         72        0.72       82.10
         22 |        286        2.86       84.96
         23 |        101        1.01       85.97
         24 |        240        2.40       88.37
         25 |         57        0.57       88.94
         26 |         73        0.73       89.67
         27 |        505        5.05       94.72
         28 |        305        3.05       97.77
         29 |         85        0.85       98.62
         31 |        132        1.32       99.94
         99 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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