Frequencies for first 10,000 rows of ethun variable in nhamcsed2009 dataset :

    patient |
ethnicity - |
  unimputed |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      1,077       10.77       10.77
          1 |      1,458       14.58       25.35
          2 |      7,465       74.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016