Frequencies for first 10,000 rows of vaginal variable in natl1999 dataset :

    Vaginal |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,543       75.43       75.43
          2 |      2,431       24.31       99.74
          9 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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