Frequencies for first 10,000 rows of nanemia variable in natlterr2001 dataset :

     Anemia |
(Hct.<39/Hg |
     b.<13) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          6        0.06        0.06
          2 |      9,970       99.70       99.76
          8 |         20        0.20       99.96
          9 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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