Frequencies for first 10,000 rows of ume_vag variable in natlterr2010 dataset :

Vaginal RFP |
730=f_u_vag |
          U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,570       25.70       25.70
          2 |        823        8.23       33.93
          9 |      1,263       12.63       46.56
          . |      5,344       53.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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