Frequencies for first 10,000 rows of anemia variable in natl1991 dataset :

     Anemia |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        287        2.87        2.87
          2 |      9,706       97.06       99.93
          9 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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