Frequencies for first 10,000 rows of cause33d variable in nhamcsopd1997 dataset :

   cause of |
injury #3 - |
      broad |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,995       99.95       99.95
        849 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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