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

      Asst. |
Reproductiv |
          e |
 Technology |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |         48        0.48        0.48
          U |        128        1.28        1.76
          X |      9,777       97.77       99.53
          Y |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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