Frequencies for first 10,000 rows of nanemia variable in natl1990 dataset :

     Anemia |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         11        0.11        0.11
          2 |      9,922       99.22       99.33
          9 |         67        0.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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