Frequencies for first 10,000 rows of uab_anem variable in natl2004 dataset :

   Anemia U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         11        0.11        0.11
          2 |      8,804       88.04       88.15
          9 |      1,185       11.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 21 Jan 2016