Frequencies for first 10,000 rows of cause2 variable in namcs1997 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,920       99.20       99.20
       8490 |          8        0.08       99.28
       8493 |         45        0.45       99.73
       8494 |          1        0.01       99.74
       8495 |          1        0.01       99.75
       8496 |          9        0.09       99.84
       8497 |          3        0.03       99.87
       8498 |          2        0.02       99.89
       888- |          3        0.03       99.92
       9057 |          1        0.01       99.93
       9064 |          2        0.02       99.95
       927- |          1        0.01       99.96
       9288 |          1        0.01       99.97
       9305 |          1        0.01       99.98
       9356 |          1        0.01       99.99
       9379 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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