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

  Paternity |
Acknowledge |
    d Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |        999        9.99        9.99
          U |         77        0.77       10.76
          X |      6,421       64.21       74.97
          Y |      2,503       25.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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