Frequencies for first 10,000 rows of ume_vag variable in natlterr2007 dataset :

Vaginal RFP |
730=f_u_vag |
          U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,565       35.65       35.65
          2 |      1,141       11.41       47.06
          9 |      1,457       14.57       61.63
          . |      3,837       38.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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