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

     Anemia |
(Hct.<30/Hg |
     b.<10) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        306        3.06        3.06
          2 |      9,692       96.92       99.98
          8 |          1        0.01       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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