Frequencies for first 10,000 rows of uab_anem variable in natl2006 dataset :

 Anemia RFP |
740=f_uab_a |
    nemia U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         12        0.12        0.12
          2 |      9,848       98.48       98.60
          9 |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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