Frequencies for first 10,000 rows of famplan variable in nhamcsopd2011 dataset :

     Family |
planning/Co |
ntraception |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,733       97.33       97.33
        Yes |        267        2.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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