Frequencies for first 10,000 rows of nanemia variable in natl2001 dataset :

     Anemia |
(Hct.<39/Hg |
     b.<13) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         10        0.10        0.10
          2 |      9,987       99.87       99.97
          8 |          1        0.01       99.98
          9 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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