Frequencies for first 10,000 rows of autopsy variable in mortterr2007 dataset :

    Autopsy |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      8,310       83.10       83.10
          U |         17        0.17       83.27
          Y |      1,673       16.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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