Frequencies for first 10,000 rows of mtran variable in natl2016 dataset :

     Mother |
Transferred |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,092       90.92       90.92
          U |          1        0.01       90.93
          Y |        907        9.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 4 Oct 2017