Frequencies for first 10,000 rows of anemia variable in natl1992 dataset :

     Anemia |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        209        2.09        2.09
          2 |      9,765       97.65       99.74
          9 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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