Frequencies for first 10,000 rows of cause3 variable in nhamcsed1998 dataset :

   cause of |
  injury #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,980       99.80       99.80
       8490 |          8        0.08       99.88
       8496 |          4        0.04       99.92
       8497 |          1        0.01       99.93
       8843 |          1        0.01       99.94
       888- |          2        0.02       99.96
       9490 |          2        0.02       99.98
       9673 |          1        0.01       99.99
       9682 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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