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

      Asst. |
Reproductiv |
          e |
 Technology |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |          2        0.02       10.80
          U |         84        0.84       11.64
          X |      8,831       88.31       99.95
          Y |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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