Frequencies for first 10,000 rows of cause33d variable in nhamcsed1994 dataset :

   cause of |
injury #3 - |
      broad |      Freq.     Percent        Cum.
------------+-----------------------------------
       8000 |      9,893       98.93       98.93
       8001 |        106        1.06       99.99
       8957 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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