Frequencies for first 10,000 rows of fetal variable in namcs2012 dataset :

      Fetal |
 monitoring |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,929       99.29       99.29
        Yes |         71        0.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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