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

    Genital |
 Herpes RFP |
685=f_urf_h |
    erpes U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        128        1.28        1.28
          2 |      9,728       97.28       98.56
          9 |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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