Frequencies for first 10,000 rows of mtran variable in natlterr2015 dataset :

     Mother |
Transferred |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |      8,827       88.27       99.05
          U |         75        0.75       99.80
          Y |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016