Frequencies for first 10,000 rows of cause2 variable in namcs1996 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,933       99.33       99.33
       8490 |         10        0.10       99.43
       8493 |         26        0.26       99.69
       8494 |          3        0.03       99.72
       8495 |          4        0.04       99.76
       8496 |          3        0.03       99.79
       8497 |          2        0.02       99.81
       8498 |          2        0.02       99.83
       8849 |          1        0.01       99.84
       885- |          2        0.02       99.86
       888- |          3        0.03       99.89
       9179 |          2        0.02       99.91
       9192 |          1        0.01       99.92
       9262 |          1        0.01       99.93
       927- |          2        0.02       99.95
       9289 |          1        0.01       99.96
       9290 |          1        0.01       99.97
       9293 |          1        0.01       99.98
       9308 |          1        0.01       99.99
       9430 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016