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

doa/died in |
         ed |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,966       99.66       99.66
          1 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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