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

Vaginal RFP |
730=f_u_vag |
          U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,671       76.71       76.71
          2 |      2,278       22.78       99.49
          9 |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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