Frequencies for first 10,000 rows of cause3 variable in nhamcsed1999 dataset :

   cause of |
  injury #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,998       99.98       99.98
       8502 |          1        0.01       99.99
       8532 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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