Frequencies for first 10,000 rows of famplan variable in namcs2009 dataset :

     family |
planing/con |
 traception |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,861       98.61       98.61
        yes |        139        1.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016