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

Hemoglobino |
  pathy RFP |
687=f_urf_h |
      emo U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.01        0.01
          2 |      9,855       98.55       98.56
          9 |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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