Frequencies for first 10,000 rows of vaginal variable in natl2002 dataset :

    Vaginal |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,049       80.49       80.49
          2 |      1,930       19.30       99.79
          9 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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