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

      First |
    Harmful |
      Event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        862        8.62        8.62
          2 |          1        0.01        8.63
          3 |          8        0.08        8.71
          5 |         55        0.55        9.26
          6 |          3        0.03        9.29
          7 |          6        0.06        9.35
          8 |      1,185       11.85       21.20
          9 |        134        1.34       22.54
         10 |         55        0.55       23.09
         11 |         10        0.10       23.19
         12 |      5,213       52.13       75.32
         13 |        210        2.10       77.42
         14 |        197        1.97       79.39
         15 |          9        0.09       79.48
         16 |          1        0.01       79.49
         17 |         50        0.50       79.99
         18 |         23        0.23       80.22
         19 |         17        0.17       80.39
         20 |          1        0.01       80.40
         21 |         26        0.26       80.66
         22 |         18        0.18       80.84
         23 |         30        0.30       81.14
         24 |        203        2.03       83.17
         25 |         53        0.53       83.70
         26 |         15        0.15       83.85
         27 |         78        0.78       84.63
         29 |         28        0.28       84.91
         30 |        138        1.38       86.29
         31 |         44        0.44       86.73
         32 |         69        0.69       87.42
         33 |        258        2.58       90.00
         34 |        107        1.07       91.07
         35 |        137        1.37       92.44
         36 |         25        0.25       92.69
         37 |         65        0.65       93.34
         38 |         91        0.91       94.25
         39 |         35        0.35       94.60
         40 |          9        0.09       94.69
         41 |         44        0.44       95.13
         42 |        305        3.05       98.18
         43 |        169        1.69       99.87
         44 |          2        0.02       99.89
         99 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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