Frequencies for first 10,000 rows of autopsy variable in mort1975 dataset :

    autopsy |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,185       31.85       31.85
          2 |      5,179       51.79       83.64
          8 |          1        0.01       83.65
          9 |      1,635       16.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015