Frequencies for first 10,000 rows of mtran variable in natl2014 dataset :

     Mother |
Transferred |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,168       91.68       91.68
          U |         25        0.25       91.93
          Y |        807        8.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016