Frequencies for first 10,000 rows of rf_fedrg variable in natlterr2014 dataset 

  Fertility |
  Enhancing |
Drugs Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,077       10.77       10.77
          N |          3        0.03       10.80
          U |         85        0.85       11.65
          X |      8,831       88.31       99.96
          Y |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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